671189537064 has 32 divisors (see below), whose sum is σ = 1677997343520. Its totient is φ = 223726712256.

The previous prime is 671189537063. The next prime is 671189537069. The reversal of 671189537064 is 460735981176.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 671189536995 and 671189537013.

It is not an unprimeable number, because it can be changed into a prime (671189537063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2105274 + ... + 2403030.

It is an arithmetic number, because the mean of its divisors is an integer number (52437416985).

Almost surely, 2^671189537064 is an apocalyptic number.

It is an amenable number.

671189537064 is an abundant number, since it is smaller than the sum of its proper divisors (1006807806456).

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

671189537064 is a wasteful number, since it uses less digits than its factorization.

671189537064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391689 (or 391685 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 57.

The spelling of 671189537064 in words is "six hundred seventy-one billion, one hundred eighty-nine million, five hundred thirty-seven thousand, sixty-four".