118154835921 has 16 divisors (see below), whose sum is σ = 160419351744. Its totient is φ = 77343135744.

The previous prime is 118154835919. The next prime is 118154835937. The reversal of 118154835921 is 129538451811.

It is not a de Polignac number, because 118154835921 - 2¹ = 118154835919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (118154835901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1592416 + ... + 1664961.

It is an arithmetic number, because the mean of its divisors is an integer number (10026209484).

Almost surely, 2^118154835921 is an apocalyptic number.

It is an amenable number.

118154835921 is a deficient number, since it is larger than the sum of its proper divisors (42264515823).

118154835921 is a wasteful number, since it uses less digits than its factorization.

118154835921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3257600.

The product of its digits is 345600, while the sum is 48.

The spelling of 118154835921 in words is "one hundred eighteen billion, one hundred fifty-four million, eight hundred thirty-five thousand, nine hundred twenty-one".