39681607892 has 12 divisors (see below), whose sum is σ = 69451111380. Its totient is φ = 19838433216.

The previous prime is 39681607871. The next prime is 39681607921. The reversal of 39681607892 is 29870618693.

It can be written as a sum of positive squares in 2 ways, for example, as 12885882256 + 26795725636 = 113516^2 + 163694^2 .

It is a hoax number, since the sum of its digits (59) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 554753 + ... + 622184.

It is an arithmetic number, because the mean of its divisors is an integer number (5787592615).

Almost surely, 2^39681607892 is an apocalyptic number.

It is an amenable number.

39681607892 is a deficient number, since it is larger than the sum of its proper divisors (29769503488).

39681607892 is a wasteful number, since it uses less digits than its factorization.

39681607892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1185370 (or 1185368 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 59.

The spelling of 39681607892 in words is "thirty-nine billion, six hundred eighty-one million, six hundred seven thousand, eight hundred ninety-two".