39955197556 has 48 divisors (see below), whose sum is σ = 72425041920. Its totient is φ = 19277223680.

The previous prime is 39955197521. The next prime is 39955197587. The reversal of 39955197556 is 65579155993.

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 15 ways as a sum of consecutive naturals, for example, 3598245 + ... + 3609331.

It is an arithmetic number, because the mean of its divisors is an integer number (1508855040).

Almost surely, 2^39955197556 is an apocalyptic number.

It is an amenable number.

39955197556 is a deficient number, since it is larger than the sum of its proper divisors (32469844364).

39955197556 is a wasteful number, since it uses less digits than its factorization.

39955197556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11424 (or 11422 counting only the distinct ones).

The product of its digits is 57408750, while the sum is 64.

The spelling of 39955197556 in words is "thirty-nine billion, nine hundred fifty-five million, one hundred ninety-seven thousand, five hundred fifty-six".