111610655081 has 2 divisors, whose sum is σ = 111610655082. Its totient is φ = 111610655080.

The previous prime is 111610655069. The next prime is 111610655087. The reversal of 111610655081 is 180556016111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104280555625 + 7330099456 = 322925^2 + 85616^2 .

It is a cyclic number.

It is not a de Polignac number, because 111610655081 - 2³⁰ = 110536913257 is a prime.

It is a super-2 number, since 2×111610655081² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111610655087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55805327540 + 55805327541.

It is an arithmetic number, because the mean of its divisors is an integer number (55805327541).

Almost surely, 2^111610655081 is an apocalyptic number.

It is an amenable number.

111610655081 is a deficient number, since it is larger than the sum of its proper divisors (1).

111610655081 is an equidigital number, since it uses as much as digits as its factorization.

111610655081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 35.

The spelling of 111610655081 in words is "one hundred eleven billion, six hundred ten million, six hundred fifty-five thousand, eighty-one".