108659578638 has 256 divisors, whose sum is σ = 264060518400. Its totient is φ = 29506498560.

The previous prime is 108659578627. The next prime is 108659578649. The reversal of 108659578638 is 836875956801.

It is an interprime number because it is at equal distance from previous prime (108659578627) and next prime (108659578649).

It is a congruent number.

It is an unprimeable number.

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 127 ways as a sum of consecutive naturals, for example, 143539356 + ... + 143540112.

It is an arithmetic number, because the mean of its divisors is an integer number (1031486400).

Almost surely, 2^108659578638 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 108659578638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132030259200).

108659578638 is an abundant number, since it is smaller than the sum of its proper divisors (155400939762).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

108659578638 is a wasteful number, since it uses less digits than its factorization.

108659578638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947.

The product of its (nonzero) digits is 87091200, while the sum is 66.

The spelling of 108659578638 in words is "one hundred eight billion, six hundred fifty-nine million, five hundred seventy-eight thousand, six hundred thirty-eight".