646109260 has 12 divisors (see below), whose sum is σ = 1356829488. Its totient is φ = 258443696.

The previous prime is 646109251. The next prime is 646109279. The reversal of 646109260 is 62901646.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16152712 + ... + 16152751.

It is an arithmetic number, because the mean of its divisors is an integer number (113069124).

Almost surely, 2^646109260 is an apocalyptic number.

It is an amenable number.

646109260 is an abundant number, since it is smaller than the sum of its proper divisors (710720228).

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

646109260 is a wasteful number, since it uses less digits than its factorization.

646109260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32305472 (or 32305470 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 646109260 is about 25418.6793520041. The cubic root of 646109260 is about 864.5072806198.

The spelling of 646109260 in words is "six hundred forty-six million, one hundred nine thousand, two hundred sixty".