813406668140 has 48 divisors (see below), whose sum is σ = 1863627816960. Its totient is φ = 295754546880.

The previous prime is 813406668133. The next prime is 813406668157. The reversal of 813406668140 is 41866604318.

813406668140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2072981 + ... + 2433939.

It is an arithmetic number, because the mean of its divisors is an integer number (38825579520).

Almost surely, 2^813406668140 is an apocalyptic number.

It is an amenable number.

813406668140 is an abundant number, since it is smaller than the sum of its proper divisors (1050221148820).

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

813406668140 is a wasteful number, since it uses less digits than its factorization.

813406668140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371222 (or 371220 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 47.

The spelling of 813406668140 in words is "eight hundred thirteen billion, four hundred six million, six hundred sixty-eight thousand, one hundred forty".