99523421599 has 8 divisors (see below), whose sum is σ = 119727424640. Its totient is φ = 80816011416.

The previous prime is 99523421551. The next prime is 99523421617. The reversal of 99523421599 is 99512432599.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 99523421599 - 2¹¹ = 99523419551 is a prime.

It is a super-2 number, since 2×99523421599² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99523421519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 374148069 + ... + 374148334.

It is an arithmetic number, because the mean of its divisors is an integer number (14965928080).

Almost surely, 2^99523421599 is an apocalyptic number.

99523421599 is a deficient number, since it is larger than the sum of its proper divisors (20204003041).

99523421599 is a wasteful number, since it uses less digits than its factorization.

99523421599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748296429.

The product of its digits is 7873200, while the sum is 58.

The spelling of 99523421599 in words is "ninety-nine billion, five hundred twenty-three million, four hundred twenty-one thousand, five hundred ninety-nine".