99638809744319 has 4 divisors (see below), whose sum is σ = 99651003952680. Its totient is φ = 99626615535960.

The previous prime is 99638809744289. The next prime is 99638809744349. The reversal of 99638809744319 is 91344790883699.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (99638809744289) and next prime (99638809744349).

It is a cyclic number.

It is not a de Polignac number, because 99638809744319 - 2⁴⁴ = 82046623699903 is a prime.

It is a super-2 number, since 2×99638809744319² (a number of 29 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 (99638809744349) 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, 6097091924 + ... + 6097108265.

It is an arithmetic number, because the mean of its divisors is an integer number (24912750988170).

Almost surely, 2^{99638809744319} is an apocalyptic number.

99638809744319 is a deficient number, since it is larger than the sum of its proper divisors (12194208361).

99638809744319 is a wasteful number, since it uses less digits than its factorization.

99638809744319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12194208360.

The product of its (nonzero) digits is 2539579392, while the sum is 80.

The spelling of 99638809744319 in words is "ninety-nine trillion, six hundred thirty-eight billion, eight hundred nine million, seven hundred forty-four thousand, three hundred nineteen".