39988966684489 has 9 divisors (see below), whose sum is σ = 40020831794727. Its totient is φ = 39957126940584.

The previous prime is 39988966684439. The next prime is 39988966684493. The reversal of 39988966684489 is 98448666988993.

The square root of 39988966684489 is 6323683.

It is a perfect power (a square), and thus also a powerful number.

39988966684489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 9089820994489 + 30899145690000 = 3014933^2 + 5558700^2 .

It is not a de Polignac number, because 39988966684489 - 2¹⁵ = 39988966651721 is a prime.

It is a super-2 number, since 2×39988966684489² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 39988966684489.

It is not an unprimeable number, because it can be changed into a prime (39988966684439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 15107277364 + ... + 15107280010.

It is an arithmetic number, because the mean of its divisors is an integer number (4446759088303).

Almost surely, 2^{39988966684489} is an apocalyptic number.

39988966684489 is the 6323683-rd square number.

39988966684489 is the 3161842-nd centered octagonal number.

It is an amenable number.

39988966684489 is a deficient number, since it is larger than the sum of its proper divisors (31865110238).

39988966684489 is an frugal number, since it uses more digits than its factorization.

39988966684489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10072 (or 5036 counting only the distinct ones).

The product of its digits is 278628139008, while the sum is 97.

The spelling of 39988966684489 in words is "thirty-nine trillion, nine hundred eighty-eight billion, nine hundred sixty-six million, six hundred eighty-four thousand, four hundred eighty-nine".