123431104544 has 48 divisors (see below), whose sum is σ = 267721142976. Its totient is φ = 55549536000.

The previous prime is 123431104487. The next prime is 123431104567. The reversal of 123431104544 is 445401134321.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 123431104544.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1700372 + ... + 1771475.

It is an arithmetic number, because the mean of its divisors is an integer number (5577523812).

Almost surely, 2^123431104544 is an apocalyptic number.

It is an amenable number.

123431104544 is an abundant number, since it is smaller than the sum of its proper divisors (144290038432).

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

123431104544 is a wasteful number, since it uses less digits than its factorization.

123431104544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3471969 (or 3471961 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

Adding to 123431104544 its reverse (445401134321), we get a palindrome (568832238865).

The spelling of 123431104544 in words is "one hundred twenty-three billion, four hundred thirty-one million, one hundred four thousand, five hundred forty-four".