638612160745 has 16 divisors (see below), whose sum is σ = 868719378240. Its totient is φ = 446769964224.

The previous prime is 638612160727. The next prime is 638612160799. The reversal of 638612160745 is 547061216836.

It is a cyclic number.

It is not a de Polignac number, because 638612160745 - 2⁵ = 638612160713 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 258546199 + ... + 258548668.

It is an arithmetic number, because the mean of its divisors is an integer number (54294961140).

Almost surely, 2^638612160745 is an apocalyptic number.

638612160745 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

638612160745 is a deficient number, since it is larger than the sum of its proper divisors (230107217495).

638612160745 is a wasteful number, since it uses less digits than its factorization.

638612160745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517094904.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The spelling of 638612160745 in words is "six hundred thirty-eight billion, six hundred twelve million, one hundred sixty thousand, seven hundred forty-five".