644774301217112 has 32 divisors (see below), whose sum is σ = 1318857528272400. Its totient is φ = 293079004924800.

The previous prime is 644774301217103. The next prime is 644774301217139. The reversal of 644774301217112 is 211712103477446.

644774301217112 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185341814 + ... + 188788602.

Almost surely, 2^{644774301217112} is an apocalyptic number.

It is an amenable number.

644774301217112 is an abundant number, since it is smaller than the sum of its proper divisors (674083227055288).

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

644774301217112 is a wasteful number, since it uses less digits than its factorization.

644774301217112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5572547 (or 5572543 counting only the distinct ones).

The product of its (nonzero) digits is 1580544, while the sum is 50.

The spelling of 644774301217112 in words is "six hundred forty-four trillion, seven hundred seventy-four billion, three hundred one million, two hundred seventeen thousand, one hundred twelve".