639591416442 has 72 divisors (see below), whose sum is σ = 1580348323008. Its totient is φ = 185388786000.

The previous prime is 639591416417. The next prime is 639591416473. The reversal of 639591416442 is 244614195936.

639591416442 is a `hidden beast` number, since 6 + 3 + 9 + 59 + 141 + 6 + 442 = 666.

639591416442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2948434 + ... + 3157917.

It is an arithmetic number, because the mean of its divisors is an integer number (21949282264).

Almost surely, 2^639591416442 is an apocalyptic number.

639591416442 is an abundant number, since it is smaller than the sum of its proper divisors (940756906566).

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

639591416442 is a wasteful number, since it uses less digits than its factorization.

639591416442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6106416 (or 6106390 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 54.

The spelling of 639591416442 in words is "six hundred thirty-nine billion, five hundred ninety-one million, four hundred sixteen thousand, four hundred forty-two".