638376547075 has 24 divisors (see below), whose sum is σ = 812945825280. Its totient is φ = 497042714400.

The previous prime is 638376547051. The next prime is 638376547093. The reversal of 638376547075 is 570745673836.

It is a happy number.

It is not a de Polignac number, because 638376547075 - 2⁵ = 638376547043 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1307271 + ... + 1727920.

It is an arithmetic number, because the mean of its divisors is an integer number (33872742720).

Almost surely, 2^638376547075 is an apocalyptic number.

638376547075 is a deficient number, since it is larger than the sum of its proper divisors (174569278205).

638376547075 is a wasteful number, since it uses less digits than its factorization.

638376547075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3035427 (or 3035422 counting only the distinct ones).

The product of its (nonzero) digits is 88905600, while the sum is 61.

The spelling of 638376547075 in words is "six hundred thirty-eight billion, three hundred seventy-six million, five hundred forty-seven thousand, seventy-five".