39687215448841 has 9 divisors (see below), whose sum is σ = 39719868841863. Its totient is φ = 39654588893400.

The previous prime is 39687215448827. The next prime is 39687215448883. The reversal of 39687215448841 is 14884451278693.

It is a happy number.

The square root of 39687215448841 is 6299779.

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

It can be written as a sum of positive squares in only one way, i.e., 11938552158841 + 27748663290000 = 3455221^2 + 5267700^2 .

It is not a de Polignac number, because 39687215448841 - 2¹⁵ = 39687215416073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39687215448941) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 12290867215 + ... + 12290870443.

It is an arithmetic number, because the mean of its divisors is an integer number (4413318760207).

Almost surely, 2^{39687215448841} is an apocalyptic number.

39687215448841 is the 6299779-th square number.

39687215448841 is the 3149890-th centered octagonal number.

It is an amenable number.

39687215448841 is a deficient number, since it is larger than the sum of its proper divisors (32653393022).

39687215448841 is an frugal number, since it uses more digits than its factorization.

39687215448841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10360 (or 5180 counting only the distinct ones).

The product of its digits is 371589120, while the sum is 70.

The spelling of 39687215448841 in words is "thirty-nine trillion, six hundred eighty-seven billion, two hundred fifteen million, four hundred forty-eight thousand, eight hundred forty-one".