78077393256 has 32 divisors (see below), whose sum is σ = 203680157760. Its totient is φ = 24894241152.

The previous prime is 78077393237. The next prime is 78077393257. The reversal of 78077393256 is 65239377087.

It is a junction number, because it is equal to n+sod(n) for n = 78077393196 and 78077393205.

It is not an unprimeable number, because it can be changed into a prime (78077393257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70721725 + ... + 70722828.

It is an arithmetic number, because the mean of its divisors is an integer number (6365004930).

Almost surely, 2^78077393256 is an apocalyptic number.

It is an amenable number.

78077393256 is an abundant number, since it is smaller than the sum of its proper divisors (125602764504).

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

78077393256 is a wasteful number, since it uses less digits than its factorization.

78077393256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141444585 (or 141444581 counting only the distinct ones).

The product of its (nonzero) digits is 13335840, while the sum is 57.

The spelling of 78077393256 in words is "seventy-eight billion, seventy-seven million, three hundred ninety-three thousand, two hundred fifty-six".