638018578383360 has 160 divisors (see below), whose sum is σ = 2042837766889920. Its totient is φ = 169873685495808.

The previous prime is 638018578383343. The next prime is 638018578383443. The reversal of 638018578383360 is 63383875810836.

It is a tau number, because it is divible by the number of its divisors (160).

It is a super-2 number, since 2×638018578383360² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59661555 + ... + 69538034.

It is an arithmetic number, because the mean of its divisors is an integer number (12767736043062).

Almost surely, 2^{638018578383360} is an apocalyptic number.

638018578383360 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

638018578383360 is an abundant number, since it is smaller than the sum of its proper divisors (1404819188506560).

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

638018578383360 is a wasteful number, since it uses less digits than its factorization.

638018578383360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129200258 (or 129200242 counting only the distinct ones).

The product of its (nonzero) digits is 418037760, while the sum is 69.

The spelling of 638018578383360 in words is "six hundred thirty-eight trillion, eighteen billion, five hundred seventy-eight million, three hundred eighty-three thousand, three hundred sixty".