671567212140 has 96 divisors (see below), whose sum is σ = 2061745830144. Its totient is φ = 161977724160.

The previous prime is 671567212133. The next prime is 671567212177. The reversal of 671567212140 is 41212765176.

671567212140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 671567212092 and 671567212101.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2452534 + ... + 2712573.

It is an arithmetic number, because the mean of its divisors is an integer number (21476519064).

Almost surely, 2^671567212140 is an apocalyptic number.

671567212140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

671567212140 is an abundant number, since it is smaller than the sum of its proper divisors (1390178618004).

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

671567212140 is a wasteful number, since it uses less digits than its factorization.

671567212140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5165327 (or 5165325 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 42.

The spelling of 671567212140 in words is "six hundred seventy-one billion, five hundred sixty-seven million, two hundred twelve thousand, one hundred forty".