188896641881 has 4 divisors (see below), whose sum is σ = 190766905764. Its totient is φ = 187026378000.

The previous prime is 188896641851. The next prime is 188896641883. The reversal of 188896641881 is 188146698881.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 146452401481 + 42444240400 = 382691^2 + 206020^2 .

It is a cyclic number.

It is not a de Polignac number, because 188896641881 - 2²⁶ = 188829533017 is a prime.

It is a super-2 number, since 2×188896641881² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (188896641883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 935131790 + ... + 935131991.

It is an arithmetic number, because the mean of its divisors is an integer number (47691726441).

Almost surely, 2^188896641881 is an apocalyptic number.

It is an amenable number.

188896641881 is a deficient number, since it is larger than the sum of its proper divisors (1870263883).

188896641881 is a wasteful number, since it uses less digits than its factorization.

188896641881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1870263882.

The product of its digits is 42467328, while the sum is 68.

The spelling of 188896641881 in words is "one hundred eighty-eight billion, eight hundred ninety-six million, six hundred forty-one thousand, eight hundred eighty-one".