99923635449 has 135 divisors (see below), whose sum is σ = 171197478837. Its totient is φ = 58037245200.

The previous prime is 99923635439. The next prime is 99923635457. The reversal of 99923635449 is 94453632999.

The square root of 99923635449 is 316107.

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

99923635449 is a `hidden beast` number, since 9 + 9 + 9 + 23 + 63 + 544 + 9 = 666.

It is not a de Polignac number, because 99923635449 - 2⁷ = 99923635321 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (99923635439) by changing a digit.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 970132332 + ... + 970132434.

Almost surely, 2^99923635449 is an apocalyptic number.

99923635449 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

99923635449 is the 316107-th square number.

99923635449 is the 158054-th centered octagonal number.

It is an amenable number.

99923635449 is a deficient number, since it is larger than the sum of its proper divisors (71273843388).

99923635449 is a wasteful number, since it uses less digits than its factorization.

99923635449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302 (or 148 counting only the distinct ones).

The product of its digits is 56687040, while the sum is 63.

The spelling of 99923635449 in words is "ninety-nine billion, nine hundred twenty-three million, six hundred thirty-five thousand, four hundred forty-nine".