39696976081 has 9 divisors (see below), whose sum is σ = 46179737481. Its totient is φ = 34024784052.

The previous prime is 39696976057. The next prime is 39696976103. The reversal of 39696976081 is 18067969693.

The square root of 39696976081 is 199241.

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

It is not a de Polignac number, because 39696976081 - 2⁷ = 39696975953 is a prime.

It is a super-2 number, since 2×39696976081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39696976001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1380456 + ... + 1408918.

Almost surely, 2^39696976081 is an apocalyptic number.

39696976081 is the 199241-st square number.

39696976081 is the 99621-st centered octagonal number.

It is an amenable number.

39696976081 is a deficient number, since it is larger than the sum of its proper divisors (6482761400).

39696976081 is an frugal number, since it uses more digits than its factorization.

39696976081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56940 (or 28470 counting only the distinct ones).

The product of its (nonzero) digits is 26453952, while the sum is 64.

Multiplying 39696976081 by its sum of digits (64), we get a square (2540606469184 = 1593928²).

The spelling of 39696976081 in words is "thirty-nine billion, six hundred ninety-six million, nine hundred seventy-six thousand, eighty-one".