639748125711144 has 48 divisors (see below), whose sum is σ = 1792397766006900. Its totient is φ = 205895948504064.

The previous prime is 639748125711083. The next prime is 639748125711179. The reversal of 639748125711144 is 441117521847936.

639748125711144 is a `hidden beast` number, since 6 + 3 + 9 + 7 + 4 + 8 + 1 + 2 + 571 + 11 + 44 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 616645010546244 + 23103115164900 = 24832338^2 + 4806570^2 .

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

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, 153196388169 + ... + 153196392344.

Almost surely, 2^{639748125711144} is an apocalyptic number.

It is an amenable number.

639748125711144 is an abundant number, since it is smaller than the sum of its proper divisors (1152649640295756).

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

639748125711144 is a wasteful number, since it uses less digits than its factorization.

639748125711144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306392780554 (or 306392780547 counting only the distinct ones).

The product of its digits is 40642560, while the sum is 63.

The spelling of 639748125711144 in words is "six hundred thirty-nine trillion, seven hundred forty-eight billion, one hundred twenty-five million, seven hundred eleven thousand, one hundred forty-four".