638874112016 has 60 divisors (see below), whose sum is σ = 1515696270480. Its totient is φ = 259392490560.

The previous prime is 638874111991. The next prime is 638874112021. The reversal of 638874112016 is 610211478836.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21429590 + ... + 21459381.

It is an arithmetic number, because the mean of its divisors is an integer number (25261604508).

Almost surely, 2^638874112016 is an apocalyptic number.

It is an amenable number.

638874112016 is an abundant number, since it is smaller than the sum of its proper divisors (876822158464).

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

638874112016 is a wasteful number, since it uses less digits than its factorization.

638874112016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42889012 (or 42888999 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 47.

The spelling of 638874112016 in words is "six hundred thirty-eight billion, eight hundred seventy-four million, one hundred twelve thousand, sixteen".