817148056 has 8 divisors (see below), whose sum is σ = 1532152620. Its totient is φ = 408574024.

The previous prime is 817148047. The next prime is 817148069. The reversal of 817148056 is 650841718.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51071746 + ... + 51071761.

Almost surely, 2^817148056 is an apocalyptic number.

It is an amenable number.

817148056 is a deficient number, since it is larger than the sum of its proper divisors (715004564).

817148056 is a wasteful number, since it uses less digits than its factorization.

817148056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102143513 (or 102143509 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 817148056 is about 28585.8016504698. The cubic root of 817148056 is about 934.9037833636.

The spelling of 817148056 in words is "eight hundred seventeen million, one hundred forty-eight thousand, fifty-six".