99871417899 has 36 divisors (see below), whose sum is σ = 161164903536. Its totient is φ = 59535828000.

The previous prime is 99871417873. The next prime is 99871417927.

99871417899 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 99871417899 - 2⁸ = 99871417643 is a prime.

It is a super-2 number, since 2×99871417899² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (99871413899) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 685287 + ... + 818144.

It is an arithmetic number, because the mean of its divisors is an integer number (4476802876).

Almost surely, 2^99871417899 is an apocalyptic number.

99871417899 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

99871417899 is a deficient number, since it is larger than the sum of its proper divisors (61293485637).

99871417899 is a wasteful number, since it uses less digits than its factorization.

99871417899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1503520 (or 1503506 counting only the distinct ones).

The product of its digits is 82301184, while the sum is 72.

The spelling of 99871417899 in words is "ninety-nine billion, eight hundred seventy-one million, four hundred seventeen thousand, eight hundred ninety-nine".