671946998931 has 24 divisors (see below), whose sum is σ = 1047249550256. Its totient is φ = 412715165760.

The previous prime is 671946998923. The next prime is 671946999043. The reversal of 671946998931 is 139899649176.

It is a happy number.

671946998931 is a `hidden beast` number, since 6 + 71 + 9 + 469 + 9 + 8 + 93 + 1 = 666.

It is not a de Polignac number, because 671946998931 - 2³ = 671946998923 is a prime.

It is a super-2 number, since 2×671946998931² (a number of 24 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 671946998931.

It is not an unprimeable number, because it can be changed into a prime (671946998911) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5429380 + ... + 5551761.

Almost surely, 2^671946998931 is an apocalyptic number.

671946998931 is a deficient number, since it is larger than the sum of its proper divisors (375302551325).

671946998931 is a wasteful number, since it uses less digits than its factorization.

671946998931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10981683 (or 10981680 counting only the distinct ones).

The product of its digits is 158723712, while the sum is 72.

The spelling of 671946998931 in words is "six hundred seventy-one billion, nine hundred forty-six million, nine hundred ninety-eight thousand, nine hundred thirty-one".