39649431964 has 12 divisors (see below), whose sum is σ = 69787585224. Its totient is φ = 19710121904.

The previous prime is 39649431947. The next prime is 39649431979. The reversal of 39649431964 is 46913494693.

It is a junction number, because it is equal to n+sod(n) for n = 39649431899 and 39649431908.

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, 28647742 + ... + 28649125.

It is an arithmetic number, because the mean of its divisors is an integer number (5815632102).

Almost surely, 2^39649431964 is an apocalyptic number.

It is an amenable number.

39649431964 is a deficient number, since it is larger than the sum of its proper divisors (30138153260).

39649431964 is a wasteful number, since it uses less digits than its factorization.

39649431964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57297044 (or 57297042 counting only the distinct ones).

The product of its digits is 15116544, while the sum is 58.

The spelling of 39649431964 in words is "thirty-nine billion, six hundred forty-nine million, four hundred thirty-one thousand, nine hundred sixty-four".