188117031354 has 32 divisors (see below), whose sum is σ = 443852169216. Its totient is φ = 52013925360.

The previous prime is 188117031343. The next prime is 188117031397. The reversal of 188117031354 is 453130711881.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72240262 + ... + 72242865.

It is an arithmetic number, because the mean of its divisors is an integer number (13870380288).

Almost surely, 2^188117031354 is an apocalyptic number.

188117031354 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

188117031354 is an abundant number, since it is smaller than the sum of its proper divisors (255735137862).

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

188117031354 is a wasteful number, since it uses less digits than its factorization.

188117031354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144483170.

The product of its (nonzero) digits is 80640, while the sum is 42.

The spelling of 188117031354 in words is "one hundred eighty-eight billion, one hundred seventeen million, thirty-one thousand, three hundred fifty-four".