638376547017 has 32 divisors (see below), whose sum is σ = 940412390400. Its totient is φ = 381957981120.

The previous prime is 638376547007. The next prime is 638376547043. The reversal of 638376547017 is 710745673836.

It is not a de Polignac number, because 638376547017 - 2⁴ = 638376547001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (638376547007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3748563 + ... + 3915159.

It is an arithmetic number, because the mean of its divisors is an integer number (29387887200).

Almost surely, 2^638376547017 is an apocalyptic number.

It is an amenable number.

638376547017 is a deficient number, since it is larger than the sum of its proper divisors (302035843383).

638376547017 is a wasteful number, since it uses less digits than its factorization.

638376547017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168093.

The product of its (nonzero) digits is 17781120, while the sum is 57.

The spelling of 638376547017 in words is "six hundred thirty-eight billion, three hundred seventy-six million, five hundred forty-seven thousand, seventeen".