638862016060 has 24 divisors (see below), whose sum is σ = 1341626637456. Its totient is φ = 255541681920.

The previous prime is 638862016043. The next prime is 638862016069. The reversal of 638862016060 is 60610268836.

It is a self number, because there is not a number n which added to its sum of digits gives 638862016060.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638862016069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2194875 + ... + 2468845.

It is an arithmetic number, because the mean of its divisors is an integer number (55901109894).

Almost surely, 2^638862016060 is an apocalyptic number.

It is an amenable number.

638862016060 is an abundant number, since it is smaller than the sum of its proper divisors (702764621396).

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

638862016060 is a wasteful number, since it uses less digits than its factorization.

638862016060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390573 (or 390571 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 46.

The spelling of 638862016060 in words is "six hundred thirty-eight billion, eight hundred sixty-two million, sixteen thousand, sixty".