646813493088 has 96 divisors (see below), whose sum is σ = 1941164870400. Its totient is φ = 184734865920.

The previous prime is 646813493087. The next prime is 646813493143. The reversal of 646813493088 is 880394318646.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646813493087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1635418 + ... + 1992038.

It is an arithmetic number, because the mean of its divisors is an integer number (20220467400).

Almost surely, 2^646813493088 is an apocalyptic number.

It is an amenable number.

646813493088 is an abundant number, since it is smaller than the sum of its proper divisors (1294351377312).

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

646813493088 is a wasteful number, since it uses less digits than its factorization.

646813493088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359340 (or 359332 counting only the distinct ones).

The product of its (nonzero) digits is 23887872, while the sum is 60.

The spelling of 646813493088 in words is "six hundred forty-six billion, eight hundred thirteen million, four hundred ninety-three thousand, eighty-eight".