231736790128 has 20 divisors (see below), whose sum is σ = 452220179320. Its totient is φ = 115034808384.

The previous prime is 231736790123. The next prime is 231736790149. The reversal of 231736790128 is 821097637132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231736790123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52096875 + ... + 52101322.

It is an arithmetic number, because the mean of its divisors is an integer number (22611008966).

Almost surely, 2^231736790128 is an apocalyptic number.

It is an amenable number.

231736790128 is a deficient number, since it is larger than the sum of its proper divisors (220483389192).

231736790128 is a wasteful number, since it uses less digits than its factorization.

231736790128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104198344 (or 104198338 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 49.

The spelling of 231736790128 in words is "two hundred thirty-one billion, seven hundred thirty-six million, seven hundred ninety thousand, one hundred twenty-eight".