188080107581 has 2 divisors, whose sum is σ = 188080107582. Its totient is φ = 188080107580.

The previous prime is 188080107571. The next prime is 188080107617. The reversal of 188080107581 is 185701080881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 168358399225 + 19721708356 = 410315^2 + 140434^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-188080107581 is a prime.

It is a super-2 number, since 2×188080107581² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188080107541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94040053790 + 94040053791.

It is an arithmetic number, because the mean of its divisors is an integer number (94040053791).

Almost surely, 2^188080107581 is an apocalyptic number.

It is an amenable number.

188080107581 is a deficient number, since it is larger than the sum of its proper divisors (1).

188080107581 is an equidigital number, since it uses as much as digits as its factorization.

188080107581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 143360, while the sum is 47.

The spelling of 188080107581 in words is "one hundred eighty-eight billion, eighty million, one hundred seven thousand, five hundred eighty-one".