815206375264 has 48 divisors (see below), whose sum is σ = 1706639236848. Its totient is φ = 381980004352.

The previous prime is 815206375237. The next prime is 815206375273. The reversal of 815206375264 is 462573602518.

It is a super-2 number, since 2×815206375264² (a number of 25 digits) contains 22 as substring.

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, 3089002 + ... + 3342505.

It is an arithmetic number, because the mean of its divisors is an integer number (35554984101).

Almost surely, 2^815206375264 is an apocalyptic number.

It is an amenable number.

815206375264 is an abundant number, since it is smaller than the sum of its proper divisors (891432861584).

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

815206375264 is a wasteful number, since it uses less digits than its factorization.

815206375264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6431767 (or 6431759 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 49.

The spelling of 815206375264 in words is "eight hundred fifteen billion, two hundred six million, three hundred seventy-five thousand, two hundred sixty-four".