39649725808 has 40 divisors (see below), whose sum is σ = 95777262720. Its totient is φ = 15447944640.

The previous prime is 39649725799. The next prime is 39649725823. The reversal of 39649725808 is 80852794693.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 16090378 + ... + 16092841.

It is an arithmetic number, because the mean of its divisors is an integer number (2394431568).

Almost surely, 2^39649725808 is an apocalyptic number.

It is an amenable number.

39649725808 is an abundant number, since it is smaller than the sum of its proper divisors (56127536912).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39649725808 is a wasteful number, since it uses less digits than its factorization.

39649725808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32183245 (or 32183239 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 61.

The spelling of 39649725808 in words is "thirty-nine billion, six hundred forty-nine million, seven hundred twenty-five thousand, eight hundred eight".