188191353361 has 12 divisors (see below), whose sum is σ = 207017113716. Its totient is φ = 170948935520.

The previous prime is 188191353359. The next prime is 188191353419. The reversal of 188191353361 is 163353191881.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 62570019600 + 125621333761 = 250140^2 + 354431^2 .

It is not a de Polignac number, because 188191353361 - 2¹ = 188191353359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (188191359361) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 454450 + ... + 763483.

It is an arithmetic number, because the mean of its divisors is an integer number (17251426143).

Almost surely, 2^188191353361 is an apocalyptic number.

188191353361 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

188191353361 is a deficient number, since it is larger than the sum of its proper divisors (18825760355).

188191353361 is a wasteful number, since it uses less digits than its factorization.

188191353361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1219232 (or 1219221 counting only the distinct ones).

The product of its digits is 466560, while the sum is 49.

The spelling of 188191353361 in words is "one hundred eighty-eight billion, one hundred ninety-one million, three hundred fifty-three thousand, three hundred sixty-one".