231646646132 has 18 divisors (see below), whose sum is σ = 445584768594. Its totient is φ = 105293929840.

The previous prime is 231646646129. The next prime is 231646646171.

231646646132 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 230501771236 + 1144874896 = 480106^2 + 33836^2 .

It is a super-2 number, since 2×231646646132² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 239303903 + ... + 239304870.

Almost surely, 2^231646646132 is an apocalyptic number.

231646646132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

231646646132 is a deficient number, since it is larger than the sum of its proper divisors (213938122462).

231646646132 is a wasteful number, since it uses less digits than its factorization.

231646646132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478608799 (or 478608786 counting only the distinct ones).

The product of its digits is 746496, while the sum is 44.

It can be divided in two parts, 231646 and 646132, that added together give a palindrome (877778).

The spelling of 231646646132 in words is "two hundred thirty-one billion, six hundred forty-six million, six hundred forty-six thousand, one hundred thirty-two".