89566612129 has 2 divisors, whose sum is σ = 89566612130. Its totient is φ = 89566612128.

The previous prime is 89566612111. The next prime is 89566612151. The reversal of 89566612129 is 92121666598.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87986390625 + 1580221504 = 296625^2 + 39752^2 .

It is a cyclic number.

It is not a de Polignac number, because 89566612129 - 2⁷ = 89566612001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 89566612129.

It is not a weakly prime, because it can be changed into another prime (89566912129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44783306064 + 44783306065.

It is an arithmetic number, because the mean of its divisors is an integer number (44783306065).

Almost surely, 2^89566612129 is an apocalyptic number.

It is an amenable number.

89566612129 is a deficient number, since it is larger than the sum of its proper divisors (1).

89566612129 is an equidigital number, since it uses as much as digits as its factorization.

89566612129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2799360, while the sum is 55.

The spelling of 89566612129 in words is "eighty-nine billion, five hundred sixty-six million, six hundred twelve thousand, one hundred twenty-nine".