39975643936 has 24 divisors (see below), whose sum is σ = 78710621724. Its totient is φ = 19985644800.

The previous prime is 39975643927. The next prime is 39975643957. The reversal of 39975643936 is 63934657993.

It can be written as a sum of positive squares in 2 ways, for example, as 39300683536 + 674960400 = 198244^2 + 25980^2 .

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 3 ways as a sum of consecutive naturals, for example, 253746 + ... + 379918.

Almost surely, 2^39975643936 is an apocalyptic number.

It is an amenable number.

39975643936 is a deficient number, since it is larger than the sum of its proper divisors (38734977788).

39975643936 is a wasteful number, since it uses less digits than its factorization.

39975643936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136084 (or 136076 counting only the distinct ones).

The product of its digits is 99202320, while the sum is 64.

The spelling of 39975643936 in words is "thirty-nine billion, nine hundred seventy-five million, six hundred forty-three thousand, nine hundred thirty-six".