99587878599 has 48 divisors (see below), whose sum is σ = 146951168000. Its totient is φ = 59944484160.

The previous prime is 99587878547. The next prime is 99587878613.

99587878599 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 99587878599 - 2⁹ = 99587878087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99587878699) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 59883642 + ... + 59885304.

Almost surely, 2^99587878599 is an apocalyptic number.

99587878599 is a deficient number, since it is larger than the sum of its proper divisors (47363289401).

99587878599 is a wasteful number, since it uses less digits than its factorization.

99587878599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2716 (or 2705 counting only the distinct ones).

The product of its digits is 4115059200, while the sum is 84.

The spelling of 99587878599 in words is "ninety-nine billion, five hundred eighty-seven million, eight hundred seventy-eight thousand, five hundred ninety-nine".