231632653040 has 80 divisors (see below), whose sum is σ = 550161894528. Its totient is φ = 90655746048.

The previous prime is 231632653033. The next prime is 231632653093. The reversal of 231632653040 is 40356236132.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

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, 18015254 + ... + 18028106.

Almost surely, 2^231632653040 is an apocalyptic number.

231632653040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231632653040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275080947264).

231632653040 is an abundant number, since it is smaller than the sum of its proper divisors (318529241488).

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

231632653040 is a wasteful number, since it uses less digits than its factorization.

231632653040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17706 (or 17700 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 35.

Adding to 231632653040 its reverse (40356236132), we get a palindrome (271988889172).

The spelling of 231632653040 in words is "two hundred thirty-one billion, six hundred thirty-two million, six hundred fifty-three thousand, forty".