817996750056 has 64 divisors (see below), whose sum is σ = 2273380200000. Its totient is φ = 272525542848.

The previous prime is 817996750049. The next prime is 817996750057. The reversal of 817996750056 is 650057699718.

817996750056 is a `hidden beast` number, since 8 + 1 + 79 + 9 + 6 + 7 + 500 + 56 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 817996749975 and 817996750002.

It is not an unprimeable number, because it can be changed into a prime (817996750057) 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, 550546 + ... + 1392513.

It is an arithmetic number, because the mean of its divisors is an integer number (35521565625).

Almost surely, 2^817996750056 is an apocalyptic number.

It is an amenable number.

817996750056 is an abundant number, since it is smaller than the sum of its proper divisors (1455383449944).

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

817996750056 is a wasteful number, since it uses less digits than its factorization.

817996750056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1945023 (or 1945013 counting only the distinct ones).

The product of its (nonzero) digits is 28576800, while the sum is 63.

The spelling of 817996750056 in words is "eight hundred seventeen billion, nine hundred ninety-six million, seven hundred fifty thousand, fifty-six".