99326455921 has 27 divisors (see below), whose sum is σ = 127032868683. Its totient is φ = 77378328720.

The previous prime is 99326455919. The next prime is 99326456057. The reversal of 99326455921 is 12955462399.

The square root of 99326455921 is 315161.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 41166381025 + 58160074896 = 202895^2 + 241164^2 .

It is not a de Polignac number, because 99326455921 - 2¹ = 99326455919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99326452921) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 24265351 + ... + 24269443.

Almost surely, 2^99326455921 is an apocalyptic number.

99326455921 is the 315161-st square number.

99326455921 is the 157581-st centered octagonal number.

It is an amenable number.

99326455921 is a deficient number, since it is larger than the sum of its proper divisors (27706412762).

99326455921 is an frugal number, since it uses more digits than its factorization.

99326455921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8222 (or 4111 counting only the distinct ones).

The product of its digits is 5248800, while the sum is 55.

The spelling of 99326455921 in words is "ninety-nine billion, three hundred twenty-six million, four hundred fifty-five thousand, nine hundred twenty-one".