671206730931 has 64 divisors (see below), whose sum is σ = 1155970137600. Its totient is φ = 385381592640.

The previous prime is 671206730921. The next prime is 671206730933. The reversal of 671206730931 is 139037602176.

671206730931 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 671206730931 - 2²¹ = 671204633779 is a prime.

It is a super-2 number, since 2×671206730931² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (671206730933) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 277146 + ... + 1191311.

It is an arithmetic number, because the mean of its divisors is an integer number (18062033400).

Almost surely, 2^671206730931 is an apocalyptic number.

671206730931 is a deficient number, since it is larger than the sum of its proper divisors (484763406669).

671206730931 is a wasteful number, since it uses less digits than its factorization.

671206730931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1468508 (or 1468490 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 45.

The spelling of 671206730931 in words is "six hundred seventy-one billion, two hundred six million, seven hundred thirty thousand, nine hundred thirty-one".