638305103381 has 8 divisors (see below), whose sum is σ = 696873067200. Its totient is φ = 579827177440.

The previous prime is 638305103363. The next prime is 638305103383. The reversal of 638305103381 is 183301503836.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 638305103381 - 2²⁶ = 638237994517 is a prime.

It is a super-2 number, since 2×638305103381² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638305103383) 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, 22494641 + ... + 22522998.

It is an arithmetic number, because the mean of its divisors is an integer number (87109133400).

Almost surely, 2^638305103381 is an apocalyptic number.

It is an amenable number.

638305103381 is a deficient number, since it is larger than the sum of its proper divisors (58567963819).

638305103381 is a wasteful number, since it uses less digits than its factorization.

638305103381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45018939.

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 638305103381 in words is "six hundred thirty-eight billion, three hundred five million, one hundred three thousand, three hundred eighty-one".