111660516481 has 2 divisors, whose sum is σ = 111660516482. Its totient is φ = 111660516480.

The previous prime is 111660516467. The next prime is 111660516521. The reversal of 111660516481 is 184615066111.

It is an a-pointer prime, because the next prime (111660516521) can be obtained adding 111660516481 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56461363456 + 55199153025 = 237616^2 + 234945^2 .

It is a cyclic number.

It is not a de Polignac number, because 111660516481 - 2²⁵ = 111626962049 is a prime.

It is a super-2 number, since 2×111660516481² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111660516181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55830258240 + 55830258241.

It is an arithmetic number, because the mean of its divisors is an integer number (55830258241).

Almost surely, 2^111660516481 is an apocalyptic number.

It is an amenable number.

111660516481 is a deficient number, since it is larger than the sum of its proper divisors (1).

111660516481 is an equidigital number, since it uses as much as digits as its factorization.

111660516481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 40.

The spelling of 111660516481 in words is "one hundred eleven billion, six hundred sixty million, five hundred sixteen thousand, four hundred eighty-one".