638177555059 has 16 divisors (see below), whose sum is σ = 698553735264. Its totient is φ = 578196921600.

The previous prime is 638177555053. The next prime is 638177555159. The reversal of 638177555059 is 950555771836.

It is a cyclic number.

It is not a de Polignac number, because 638177555059 - 2²⁷ = 638043337331 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 638177554988 and 638177555006.

It is not an unprimeable number, because it can be changed into a prime (638177555053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5825329 + ... + 5933869.

It is an arithmetic number, because the mean of its divisors is an integer number (43659608454).

Almost surely, 2^638177555059 is an apocalyptic number.

638177555059 is a deficient number, since it is larger than the sum of its proper divisors (60376180205).

638177555059 is a wasteful number, since it uses less digits than its factorization.

638177555059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110358.

The product of its (nonzero) digits is 39690000, while the sum is 61.

The spelling of 638177555059 in words is "six hundred thirty-eight billion, one hundred seventy-seven million, five hundred fifty-five thousand, fifty-nine".