15780793956 has 96 divisors (see below), whose sum is σ = 37947571200. Its totient is φ = 5102348160.

The previous prime is 15780793943. The next prime is 15780793969. The reversal of 15780793956 is 65939708751.

It is an interprime number because it is at equal distance from previous prime (15780793943) and next prime (15780793969).

It is a super-2 number, since 2×15780793956² (a number of 21 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 15780793956.

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 31 ways as a sum of consecutive naturals, for example, 21238921 + ... + 21239663.

It is an arithmetic number, because the mean of its divisors is an integer number (395287200).

Almost surely, 2^15780793956 is an apocalyptic number.

It is an amenable number.

15780793956 is an abundant number, since it is smaller than the sum of its proper divisors (22166777244).

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

15780793956 is a wasteful number, since it uses less digits than its factorization.

15780793956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1169 (or 1167 counting only the distinct ones).

The product of its (nonzero) digits is 14288400, while the sum is 60.

The spelling of 15780793956 in words is "fifteen billion, seven hundred eighty million, seven hundred ninety-three thousand, nine hundred fifty-six".