78189032956 has 24 divisors (see below), whose sum is σ = 142829245440. Its totient is φ = 37381850352.

The previous prime is 78189032927. The next prime is 78189032963. The reversal of 78189032956 is 65923098187.

It is a super-2 number, since 2×78189032956² (a number of 23 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 78189032956.

It is a congruent number.

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, 124105 + ... + 414463.

It is an arithmetic number, because the mean of its divisors is an integer number (5951218560).

Almost surely, 2^78189032956 is an apocalyptic number.

It is an amenable number.

78189032956 is a deficient number, since it is larger than the sum of its proper divisors (64640212484).

78189032956 is a wasteful number, since it uses less digits than its factorization.

78189032956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293313 (or 293311 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 58.

The spelling of 78189032956 in words is "seventy-eight billion, one hundred eighty-nine million, thirty-two thousand, nine hundred fifty-six".