188989531251 has 16 divisors (see below), whose sum is σ = 256145764224. Its totient is φ = 123929097984.

The previous prime is 188989531249. The next prime is 188989531261. The reversal of 188989531251 is 152135989881.

It is not a de Polignac number, because 188989531251 - 2¹ = 188989531249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (188989531261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1944741 + ... + 2039606.

It is an arithmetic number, because the mean of its divisors is an integer number (16009110264).

Almost surely, 2^188989531251 is an apocalyptic number.

188989531251 is a deficient number, since it is larger than the sum of its proper divisors (67156232973).

188989531251 is a wasteful number, since it uses less digits than its factorization.

188989531251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3984610.

The product of its digits is 6220800, while the sum is 60.

The spelling of 188989531251 in words is "one hundred eighty-eight billion, nine hundred eighty-nine million, five hundred thirty-one thousand, two hundred fifty-one".