123557311244 has 96 divisors (see below), whose sum is σ = 236444443200. Its totient is φ = 56276295680.

The previous prime is 123557311243. The next prime is 123557311271. The reversal of 123557311244 is 442113755321.

It is a junction number, because it is equal to n+sod(n) for n = 123557311198 and 123557311207.

It is not an unprimeable number, because it can be changed into a prime (123557311243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 104620334 + ... + 104621514.

It is an arithmetic number, because the mean of its divisors is an integer number (2462962950).

Almost surely, 2^123557311244 is an apocalyptic number.

It is an amenable number.

123557311244 is a deficient number, since it is larger than the sum of its proper divisors (112887131956).

123557311244 is a wasteful number, since it uses less digits than its factorization.

123557311244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1643 (or 1641 counting only the distinct ones).

The product of its digits is 100800, while the sum is 38.

The spelling of 123557311244 in words is "one hundred twenty-three billion, five hundred fifty-seven million, three hundred eleven thousand, two hundred forty-four".