865180056 has 64 divisors (see below), whose sum is σ = 2373325920. Its totient is φ = 261181440.

The previous prime is 865180051. The next prime is 865180087. The reversal of 865180056 is 650081568.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 865179996 and 865180023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865180051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9625 + ... + 42696.

Almost surely, 2^865180056 is an apocalyptic number.

It is an amenable number.

865180056 is an abundant number, since it is smaller than the sum of its proper divisors (1508145864).

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

865180056 is a wasteful number, since it uses less digits than its factorization.

865180056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52396 (or 52392 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 39.

The square root of 865180056 is about 29413.9432242602. The cubic root of 865180056 is about 952.8740501539.

The spelling of 865180056 in words is "eight hundred sixty-five million, one hundred eighty thousand, fifty-six".