671061864520 has 64 divisors (see below), whose sum is σ = 1558881469440. Its totient is φ = 259718188800.

The previous prime is 671061864511. The next prime is 671061864533. The reversal of 671061864520 is 25468160176.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7124130 + ... + 7217710.

It is an arithmetic number, because the mean of its divisors is an integer number (24357522960).

Almost surely, 2^671061864520 is an apocalyptic number.

It is an amenable number.

671061864520 is an abundant number, since it is smaller than the sum of its proper divisors (887819604920).

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

671061864520 is a wasteful number, since it uses less digits than its factorization.

671061864520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99406 (or 99402 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 671061864520 in words is "six hundred seventy-one billion, sixty-one million, eight hundred sixty-four thousand, five hundred twenty".