118491176921 has 8 divisors (see below), whose sum is σ = 127742081544. Its totient is φ = 109259729280.

The previous prime is 118491176873. The next prime is 118491176941. The reversal of 118491176921 is 129671194811.

It can be written as a sum of positive squares in 4 ways, for example, as 4324903696 + 114166273225 = 65764^2 + 337885^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-118491176921 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 118491176921.

It is not an unprimeable number, because it can be changed into a prime (118491176941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4851590 + ... + 4875951.

It is an arithmetic number, because the mean of its divisors is an integer number (15967760193).

Almost surely, 2^118491176921 is an apocalyptic number.

It is an amenable number.

118491176921 is a deficient number, since it is larger than the sum of its proper divisors (9250904623).

118491176921 is an equidigital number, since it uses as much as digits as its factorization.

118491176921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9728491.

The product of its digits is 217728, while the sum is 50.

The spelling of 118491176921 in words is "one hundred eighteen billion, four hundred ninety-one million, one hundred seventy-six thousand, nine hundred twenty-one".