123432241645631 has 4 divisors (see below), whose sum is σ = 126768248176632. Its totient is φ = 120096235114632.

The previous prime is 123432241645621. The next prime is 123432241645649. The reversal of 123432241645631 is 136546142234321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123432241645631 is a prime.

It is a super-2 number, since 2×123432241645631² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123432241645621) 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, 1668003265445 + ... + 1668003265518.

It is an arithmetic number, because the mean of its divisors is an integer number (31692062044158).

Almost surely, 2^{123432241645631} is an apocalyptic number.

123432241645631 is a deficient number, since it is larger than the sum of its proper divisors (3336006531001).

123432241645631 is an equidigital number, since it uses as much as digits as its factorization.

123432241645631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3336006531000.

The product of its digits is 2488320, while the sum is 47.

Adding to 123432241645631 its reverse (136546142234321), we get a palindrome (259978383879952).

The spelling of 123432241645631 in words is "one hundred twenty-three trillion, four hundred thirty-two billion, two hundred forty-one million, six hundred forty-five thousand, six hundred thirty-one".