89115655961 has 2 divisors, whose sum is σ = 89115655962. Its totient is φ = 89115655960.

The previous prime is 89115655943. The next prime is 89115655969. The reversal of 89115655961 is 16955651198.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61680702736 + 27434953225 = 248356^2 + 165635^2 .

It is a cyclic number.

It is not a de Polignac number, because 89115655961 - 2¹⁰ = 89115654937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 89115655897 and 89115655906.

It is not a weakly prime, because it can be changed into another prime (89115655969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44557827980 + 44557827981.

It is an arithmetic number, because the mean of its divisors is an integer number (44557827981).

Almost surely, 2^89115655961 is an apocalyptic number.

It is an amenable number.

89115655961 is a deficient number, since it is larger than the sum of its proper divisors (1).

89115655961 is an equidigital number, since it uses as much as digits as its factorization.

89115655961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916000, while the sum is 56.

The spelling of 89115655961 in words is "eighty-nine billion, one hundred fifteen million, six hundred fifty-five thousand, nine hundred sixty-one".