118913399569 has 4 divisors (see below), whose sum is σ = 125908305444. Its totient is φ = 111918493696.

The previous prime is 118913399513. The next prime is 118913399659. The reversal of 118913399569 is 965993319811.

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

It can be written as a sum of positive squares in 2 ways, for example, as 100400259600 + 18513139969 = 316860^2 + 136063^2 .

It is a cyclic number.

It is not a de Polignac number, because 118913399569 - 2²⁹ = 118376528657 is a prime.

It is a super-2 number, since 2×118913399569² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 118913399569.

It is not an unprimeable number, because it can be changed into a prime (118913399509) 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, 3497452912 + ... + 3497452945.

It is an arithmetic number, because the mean of its divisors is an integer number (31477076361).

Almost surely, 2^118913399569 is an apocalyptic number.

It is an amenable number.

118913399569 is a deficient number, since it is larger than the sum of its proper divisors (6994905875).

118913399569 is an equidigital number, since it uses as much as digits as its factorization.

118913399569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6994905874.

The product of its digits is 14171760, while the sum is 64.

The spelling of 118913399569 in words is "one hundred eighteen billion, nine hundred thirteen million, three hundred ninety-nine thousand, five hundred sixty-nine".