813756898040 has 32 divisors (see below), whose sum is σ = 1835123796000. Its totient is φ = 324761288064.

The previous prime is 813756898001. The next prime is 813756898043. The reversal of 813756898040 is 40898657318.

It is a happy number.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813756898043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23153195 + ... + 23188314.

It is an arithmetic number, because the mean of its divisors is an integer number (57347618625).

Almost surely, 2^813756898040 is an apocalyptic number.

It is an amenable number.

813756898040 is an abundant number, since it is smaller than the sum of its proper divisors (1021366897960).

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

813756898040 is a wasteful number, since it uses less digits than its factorization.

813756898040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46341959 (or 46341955 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 59.

The spelling of 813756898040 in words is "eight hundred thirteen billion, seven hundred fifty-six million, eight hundred ninety-eight thousand, forty".