99923816547 has 6 divisors (see below), whose sum is σ = 144334401692. Its totient is φ = 66615877692.

The previous prime is 99923816527. The next prime is 99923816557. The reversal of 99923816547 is 74561832999.

99923816547 is a `hidden beast` number, since 9 + 9 + 9 + 2 + 3 + 81 + 6 + 547 = 666.

It is not a de Polignac number, because 99923816547 - 2¹² = 99923812451 is a prime.

It is a super-2 number, since 2×99923816547² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99923816507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5551323133 + ... + 5551323150.

Almost surely, 2^99923816547 is an apocalyptic number.

99923816547 is a deficient number, since it is larger than the sum of its proper divisors (44410585145).

99923816547 is a wasteful number, since it uses less digits than its factorization.

99923816547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11102646289 (or 11102646286 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 63.

The spelling of 99923816547 in words is "ninety-nine billion, nine hundred twenty-three million, eight hundred sixteen thousand, five hundred forty-seven".