99959628809 has 4 divisors (see below), whose sum is σ = 100242800916. Its totient is φ = 99676456704.

The previous prime is 99959628787. The next prime is 99959628817. The reversal of 99959628809 is 90882695999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90882695999 = 182899 ⋅496901.

It can be written as a sum of positive squares in 2 ways, for example, as 22968918025 + 76990710784 = 151555^2 + 277472^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99959628809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99959628859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141585524 + ... + 141586229.

It is an arithmetic number, because the mean of its divisors is an integer number (25060700229).

Almost surely, 2^99959628809 is an apocalyptic number.

It is an amenable number.

99959628809 is a deficient number, since it is larger than the sum of its proper divisors (283172107).

99959628809 is a wasteful number, since it uses less digits than its factorization.

99959628809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283172106.

The product of its (nonzero) digits is 226748160, while the sum is 74.

The spelling of 99959628809 in words is "ninety-nine billion, nine hundred fifty-nine million, six hundred twenty-eight thousand, eight hundred nine".