118721698577 has 4 divisors (see below), whose sum is σ = 119450052720. Its totient is φ = 117993344436.

The previous prime is 118721698573. The next prime is 118721698631. The reversal of 118721698577 is 775896127811.

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 cyclic number.

It is not a de Polignac number, because 118721698577 - 2² = 118721698573 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118721698573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 364176827 + ... + 364177152.

It is an arithmetic number, because the mean of its divisors is an integer number (29862513180).

Almost surely, 2^118721698577 is an apocalyptic number.

It is an amenable number.

118721698577 is a deficient number, since it is larger than the sum of its proper divisors (728354143).

118721698577 is an equidigital number, since it uses as much as digits as its factorization.

118721698577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728354142.

The product of its digits is 11854080, while the sum is 62.

The spelling of 118721698577 in words is "one hundred eighteen billion, seven hundred twenty-one million, six hundred ninety-eight thousand, five hundred seventy-seven".