644713002 has 24 divisors (see below), whose sum is σ = 1399765536. Its totient is φ = 214460136.

The previous prime is 644712973. The next prime is 644713021. The reversal of 644713002 is 200317446.

644713002 is a `hidden beast` number, since 644 + 7 + 13 + 0 + 0 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28008 + ... + 45539.

It is an arithmetic number, because the mean of its divisors is an integer number (58323564).

Almost surely, 2^644713002 is an apocalyptic number.

644713002 is an abundant number, since it is smaller than the sum of its proper divisors (755052534).

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

644713002 is a wasteful number, since it uses less digits than its factorization.

644713002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74042 (or 74039 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 644713002 is about 25391.1993021204. The cubic root of 644713002 is about 863.8840909968.

The spelling of 644713002 in words is "six hundred forty-four million, seven hundred thirteen thousand, two".