813439649180 has 24 divisors (see below), whose sum is σ = 1729846345920. Its totient is φ = 321257177280.

The previous prime is 813439649179. The next prime is 813439649263. The reversal of 813439649180 is 81946934318.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

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, 257416031 + ... + 257419190.

It is an arithmetic number, because the mean of its divisors is an integer number (72076931080).

Almost surely, 2^813439649180 is an apocalyptic number.

It is an amenable number.

813439649180 is an abundant number, since it is smaller than the sum of its proper divisors (916406696740).

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

813439649180 is a wasteful number, since it uses less digits than its factorization.

813439649180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514835309 (or 514835307 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 56.

The spelling of 813439649180 in words is "eight hundred thirteen billion, four hundred thirty-nine million, six hundred forty-nine thousand, one hundred eighty".