39088016665681 has 9 divisors (see below), whose sum is σ = 39120109706001. Its totient is φ = 39055949947392.

The previous prime is 39088016665667. The next prime is 39088016665693. The reversal of 39088016665681 is 18656661088093.

The square root of 39088016665681 is 6252041.

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

It can be written as a sum of positive squares in 4 ways, for example, as 27348622027281 + 11739394638400 = 5229591^2 + 3426280^2 .

It is not a de Polignac number, because 39088016665681 - 2¹⁹ = 39088016141393 is a prime.

It is a super-2 number, since 2×39088016665681² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39088016665601) 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, 12460316145 + ... + 12460319281.

Almost surely, 2^{39088016665681} is an apocalyptic number.

39088016665681 is the 6252041-st square number.

39088016665681 is the 3126021-st centered octagonal number.

It is an amenable number.

39088016665681 is a deficient number, since it is larger than the sum of its proper divisors (32093040320).

39088016665681 is an frugal number, since it uses more digits than its factorization.

39088016665681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10260 (or 5130 counting only the distinct ones).

The product of its (nonzero) digits is 89579520, while the sum is 67.

The spelling of 39088016665681 in words is "thirty-nine trillion, eighty-eight billion, sixteen million, six hundred sixty-five thousand, six hundred eighty-one".