118121718315 has 16 divisors (see below), whose sum is σ = 193389977088. Its totient is φ = 61533173856.

The previous prime is 118121718293. The next prime is 118121718349. The reversal of 118121718315 is 513817121811.

It is not a de Polignac number, because 118121718315 - 2¹² = 118121714219 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91566579 + ... + 91567868.

It is an arithmetic number, because the mean of its divisors is an integer number (12086873568).

Almost surely, 2^118121718315 is an apocalyptic number.

118121718315 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

118121718315 is a deficient number, since it is larger than the sum of its proper divisors (75268258773).

118121718315 is a wasteful number, since it uses less digits than its factorization.

118121718315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183134498.

The product of its digits is 13440, while the sum is 39.

The spelling of 118121718315 in words is "one hundred eighteen billion, one hundred twenty-one million, seven hundred eighteen thousand, three hundred fifteen".