39661625764 has 12 divisors (see below), whose sum is σ = 70095052188. Its totient is φ = 19634468000.

The previous prime is 39661625749. The next prime is 39661625797. The reversal of 39661625764 is 46752616693.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 26709364900 + 12952260864 = 163430^2 + 113808^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49085767 + ... + 49086574.

It is an arithmetic number, because the mean of its divisors is an integer number (5841254349).

Almost surely, 2^39661625764 is an apocalyptic number.

It is an amenable number.

39661625764 is a deficient number, since it is larger than the sum of its proper divisors (30433426424).

39661625764 is a wasteful number, since it uses less digits than its factorization.

39661625764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98172446 (or 98172444 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 55.

The spelling of 39661625764 in words is "thirty-nine billion, six hundred sixty-one million, six hundred twenty-five thousand, seven hundred sixty-four".