671655164992 has 56 divisors (see below), whose sum is σ = 1529286816960. Its totient is φ = 286705344000.

The previous prime is 671655164923. The next prime is 671655165007. The reversal of 671655164992 is 299461556176.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×671655164992² (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 671655164992.

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, 2874067 + ... + 3098962.

It is an arithmetic number, because the mean of its divisors is an integer number (27308693160).

Almost surely, 2^671655164992 is an apocalyptic number.

It is an amenable number.

671655164992 is an abundant number, since it is smaller than the sum of its proper divisors (857631651968).

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

671655164992 is a wasteful number, since it uses less digits than its factorization.

671655164992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5973299 (or 5973289 counting only the distinct ones).

The product of its digits is 24494400, while the sum is 61.

The spelling of 671655164992 in words is "six hundred seventy-one billion, six hundred fifty-five million, one hundred sixty-four thousand, nine hundred ninety-two".