813100715808 has 48 divisors (see below), whose sum is σ = 2134441634976. Its totient is φ = 271026936320.

The previous prime is 813100715723. The next prime is 813100715813. The reversal of 813100715808 is 808517001318.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×813100715808² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 813100715808.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5293660 + ... + 5445092.

It is an arithmetic number, because the mean of its divisors is an integer number (44467534062).

Almost surely, 2^813100715808 is an apocalyptic number.

It is an amenable number.

813100715808 is an abundant number, since it is smaller than the sum of its proper divisors (1321340919168).

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

813100715808 is a wasteful number, since it uses less digits than its factorization.

813100715808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207377 (or 207369 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 42.

The spelling of 813100715808 in words is "eight hundred thirteen billion, one hundred million, seven hundred fifteen thousand, eight hundred eight".