12244558123557 has 6 divisors (see below), whose sum is σ = 17686583956262. Its totient is φ = 8163038749032.

The previous prime is 12244558123513. The next prime is 12244558123571. The reversal of 12244558123557 is 75532185544221.

12244558123557 is a `hidden beast` number, since 1 + 2 + 2 + 4 + 4 + 5 + 5 + 81 + 2 + 3 + 557 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12201880348161 + 42677775396 = 3493119^2 + 206586^2 .

It is not a de Polignac number, because 12244558123557 - 2⁶ = 12244558123493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12244558163557) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 680253229078 + ... + 680253229095.

Almost surely, 2^{12244558123557} is an apocalyptic number.

It is an amenable number.

12244558123557 is a deficient number, since it is larger than the sum of its proper divisors (5442025832705).

12244558123557 is a wasteful number, since it uses less digits than its factorization.

12244558123557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1360506458179 (or 1360506458176 counting only the distinct ones).

The product of its digits is 13440000, while the sum is 54.

The spelling of 12244558123557 in words is "twelve trillion, two hundred forty-four billion, five hundred fifty-eight million, one hundred twenty-three thousand, five hundred fifty-seven".