39980799656 has 32 divisors (see below), whose sum is σ = 88627392000. Its totient is φ = 16543778496.

The previous prime is 39980799641. The next prime is 39980799667. The reversal of 39980799656 is 65699708993.

It is a super-2 number, since 2×39980799656² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 39980799656.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12307736 + ... + 12310983.

It is an arithmetic number, because the mean of its divisors is an integer number (2769606000).

Almost surely, 2^39980799656 is an apocalyptic number.

It is an amenable number.

39980799656 is an abundant number, since it is smaller than the sum of its proper divisors (48646592344).

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

39980799656 is a wasteful number, since it uses less digits than its factorization.

39980799656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24618761 (or 24618757 counting only the distinct ones).

The product of its (nonzero) digits is 198404640, while the sum is 71.

The spelling of 39980799656 in words is "thirty-nine billion, nine hundred eighty million, seven hundred ninety-nine thousand, six hundred fifty-six".