231653476876818 has 128 divisors (see below), whose sum is σ = 491949204848640. Its totient is φ = 72605216597760.

The previous prime is 231653476876777. The next prime is 231653476876847. The reversal of 231653476876818 is 818678674356132.

It is a self number, because there is not a number n which added to its sum of digits gives 231653476876818.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11843820523 + ... + 11843840081.

It is an arithmetic number, because the mean of its divisors is an integer number (3843353162880).

Almost surely, 2^{231653476876818} is an apocalyptic number.

231653476876818 is an abundant number, since it is smaller than the sum of its proper divisors (260295727971822).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231653476876818 is a wasteful number, since it uses less digits than its factorization.

231653476876818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27352.

The product of its digits is 1950842880, while the sum is 75.

The spelling of 231653476876818 in words is "two hundred thirty-one trillion, six hundred fifty-three billion, four hundred seventy-six million, eight hundred seventy-six thousand, eight hundred eighteen".