12636662142 has 32 divisors (see below), whose sum is σ = 27243947808. Its totient is φ = 3884414976.

The previous prime is 12636662123. The next prime is 12636662161. The reversal of 12636662142 is 24126663621.

It is an interprime number because it is at equal distance from previous prime (12636662123) and next prime (12636662161).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 12636662142.

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, 2158 + ... + 158990.

It is an arithmetic number, because the mean of its divisors is an integer number (851373369).

Almost surely, 2^12636662142 is an apocalyptic number.

12636662142 is an abundant number, since it is smaller than the sum of its proper divisors (14607285666).

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

12636662142 is a wasteful number, since it uses less digits than its factorization.

12636662142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157884.

The product of its digits is 124416, while the sum is 39.

The spelling of 12636662142 in words is "twelve billion, six hundred thirty-six million, six hundred sixty-two thousand, one hundred forty-two".