118639674561 has 4 divisors (see below), whose sum is σ = 158186232752. Its totient is φ = 79093116372.

The previous prime is 118639674547. The next prime is 118639674577. The reversal of 118639674561 is 165476936811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-118639674561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118639674521) 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, 19773279091 + ... + 19773279096.

It is an arithmetic number, because the mean of its divisors is an integer number (39546558188).

Almost surely, 2^118639674561 is an apocalyptic number.

It is an amenable number.

118639674561 is a deficient number, since it is larger than the sum of its proper divisors (39546558191).

118639674561 is an equidigital number, since it uses as much as digits as its factorization.

118639674561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39546558190.

The product of its digits is 6531840, while the sum is 57.

The spelling of 118639674561 in words is "one hundred eighteen billion, six hundred thirty-nine million, six hundred seventy-four thousand, five hundred sixty-one".