99564129089 has 2 divisors, whose sum is σ = 99564129090. Its totient is φ = 99564129088.

The previous prime is 99564129083. The next prime is 99564129103. The reversal of 99564129089 is 98092146599.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98104889089 + 1459240000 = 313217^2 + 38200^2 .

It is an emirp because it is prime and its reverse (98092146599) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99564129089 - 2²⁴ = 99547351873 is a prime.

It is not a weakly prime, because it can be changed into another prime (99564129083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49782064544 + 49782064545.

It is an arithmetic number, because the mean of its divisors is an integer number (49782064545).

Almost surely, 2^99564129089 is an apocalyptic number.

It is an amenable number.

99564129089 is a deficient number, since it is larger than the sum of its proper divisors (1).

99564129089 is an equidigital number, since it uses as much as digits as its factorization.

99564129089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12597120, while the sum is 62.

The spelling of 99564129089 in words is "ninety-nine billion, five hundred sixty-four million, one hundred twenty-nine thousand, eighty-nine".