110661605081 has 2 divisors, whose sum is σ = 110661605082. Its totient is φ = 110661605080.

The previous prime is 110661605027. The next prime is 110661605113. The reversal of 110661605081 is 180506166011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90926974681 + 19734630400 = 301541^2 + 140480^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-110661605081 is a prime.

It is a super-2 number, since 2×110661605081² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (110661608081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55330802540 + 55330802541.

It is an arithmetic number, because the mean of its divisors is an integer number (55330802541).

Almost surely, 2^110661605081 is an apocalyptic number.

It is an amenable number.

110661605081 is a deficient number, since it is larger than the sum of its proper divisors (1).

110661605081 is an equidigital number, since it uses as much as digits as its factorization.

110661605081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 35.

The spelling of 110661605081 in words is "one hundred ten billion, six hundred sixty-one million, six hundred five thousand, eighty-one".