646025445660 has 96 divisors (see below), whose sum is σ = 2123153948160. Its totient is φ = 143672064768.

The previous prime is 646025445629. The next prime is 646025445683. The reversal of 646025445660 is 66544520646.

It is a super-2 number, since 2×646025445660² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

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, 20770350 + ... + 20801429.

It is an arithmetic number, because the mean of its divisors is an integer number (22116186960).

Almost surely, 2^646025445660 is an apocalyptic number.

646025445660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

646025445660 is an abundant number, since it is smaller than the sum of its proper divisors (1477128502500).

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

646025445660 is a wasteful number, since it uses less digits than its factorization.

646025445660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41571835 (or 41571833 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 48.

The spelling of 646025445660 in words is "six hundred forty-six billion, twenty-five million, four hundred forty-five thousand, six hundred sixty".