231776782118256 has 240 divisors, whose sum is σ = 654005600962560. Its totient is φ = 70637849694720.

The previous prime is 231776782118209. The next prime is 231776782118257. The reversal of 231776782118256 is 652811287677132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231776782118257) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1161205441 + ... + 1161405023.

It is an arithmetic number, because the mean of its divisors is an integer number (2725023337344).

Almost surely, 2^{231776782118256} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231776782118256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (327002800481280).

231776782118256 is an abundant number, since it is smaller than the sum of its proper divisors (422228818844304).

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

231776782118256 is a wasteful number, since it uses less digits than its factorization.

231776782118256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201972 (or 201947 counting only the distinct ones).

The product of its digits is 94832640, while the sum is 66.

The spelling of 231776782118256 in words is "two hundred thirty-one trillion, seven hundred seventy-six billion, seven hundred eighty-two million, one hundred eighteen thousand, two hundred fifty-six".