644463010036152 has 96 divisors (see below), whose sum is σ = 1859863745329200. Its totient is φ = 200896674481152.

The previous prime is 644463010036127. The next prime is 644463010036187. The reversal of 644463010036152 is 251630010364446.

644463010036152 is a `hidden beast` number, since 6 + 4 + 4 + 4 + 630 + 1 + 0 + 0 + 3 + 6 + 1 + 5 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 644463010036098 and 644463010036107.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1676629702 + ... + 1677014037.

Almost surely, 2^{644463010036152} is an apocalyptic number.

It is an amenable number.

644463010036152 is an abundant number, since it is smaller than the sum of its proper divisors (1215400735293048).

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

644463010036152 is a wasteful number, since it uses less digits than its factorization.

644463010036152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3353643925 (or 3353643918 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 45.

The spelling of 644463010036152 in words is "six hundred forty-four trillion, four hundred sixty-three billion, ten million, thirty-six thousand, one hundred fifty-two".