231018118112816 has 80 divisors (see below), whose sum is σ = 461576065241088. Its totient is φ = 111927362400000.

The previous prime is 231018118112783. The next prime is 231018118112833. The reversal of 231018118112816 is 618211811810132.

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, 1463700881 + ... + 1463858703.

Almost surely, 2^{231018118112816} is an apocalyptic number.

It is an amenable number.

231018118112816 is a deficient number, since it is larger than the sum of its proper divisors (230557947128272).

231018118112816 is a wasteful number, since it uses less digits than its factorization.

231018118112816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167970 (or 167964 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 44.

Adding to 231018118112816 its reverse (618211811810132), we get a palindrome (849229929922948).

The spelling of 231018118112816 in words is "two hundred thirty-one trillion, eighteen billion, one hundred eighteen million, one hundred twelve thousand, eight hundred sixteen".