12542257518 has 32 divisors (see below), whose sum is σ = 30354372864. Its totient is φ = 3372707712.

The previous prime is 12542257499. The next prime is 12542257549. The reversal of 12542257518 is 81575224521.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 12542257518.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8782380 + ... + 8783807.

It is an arithmetic number, because the mean of its divisors is an integer number (948574152).

Almost surely, 2^12542257518 is an apocalyptic number.

12542257518 is an abundant number, since it is smaller than the sum of its proper divisors (17812115346).

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

12542257518 is a wasteful number, since it uses less digits than its factorization.

12542257518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17566216.

The product of its digits is 224000, while the sum is 42.

The spelling of 12542257518 in words is "twelve billion, five hundred forty-two million, two hundred fifty-seven thousand, five hundred eighteen".