123013286557 has 16 divisors (see below), whose sum is σ = 148158323200. Its totient is φ = 99774108720.

The previous prime is 123013286531. The next prime is 123013286563. The reversal of 123013286557 is 755682310321.

It is not a de Polignac number, because 123013286557 - 2¹¹ = 123013284509 is a prime.

It is the 350733-rd Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123013286507) by changing a digit.

It is a nontrivial repunit in base 350732.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 424119 + ... + 652612.

It is an arithmetic number, because the mean of its divisors is an integer number (9259895200).

Almost surely, 2^123013286557 is an apocalyptic number.

It is an amenable number.

123013286557 is a deficient number, since it is larger than the sum of its proper divisors (25145036643).

123013286557 is a wasteful number, since it uses less digits than its factorization.

123013286557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077616.

The product of its (nonzero) digits is 302400, while the sum is 43.

Adding to 123013286557 its reverse (755682310321), we get a palindrome (878695596878).

The spelling of 123013286557 in words is "one hundred twenty-three billion, thirteen million, two hundred eighty-six thousand, five hundred fifty-seven".