117872705538 has 48 divisors (see below), whose sum is σ = 291894794880. Its totient is φ = 33675663168.

The previous prime is 117872705491. The next prime is 117872705539. The reversal of 117872705538 is 835507278711.

117872705538 is a `hidden beast` number, since 1 + 1 + 7 + 87 + 2 + 7 + 0 + 553 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (117872705539) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3092883 + ... + 3130761.

It is an arithmetic number, because the mean of its divisors is an integer number (6081141560).

Almost surely, 2^117872705538 is an apocalyptic number.

117872705538 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

117872705538 is an abundant number, since it is smaller than the sum of its proper divisors (174022089342).

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

117872705538 is a wasteful number, since it uses less digits than its factorization.

117872705538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62591 (or 62588 counting only the distinct ones).

The product of its (nonzero) digits is 3292800, while the sum is 54.

The spelling of 117872705538 in words is "one hundred seventeen billion, eight hundred seventy-two million, seven hundred five thousand, five hundred thirty-eight".