12531637842 has 32 divisors (see below), whose sum is σ = 25905707520. Its totient is φ = 4037160960.

The previous prime is 12531637813. The next prime is 12531637889. The reversal of 12531637842 is 24873613521.

12531637842 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 12531637794 and 12531637803.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99228 + ... + 186840.

It is an arithmetic number, because the mean of its divisors is an integer number (809553360).

Almost surely, 2^12531637842 is an apocalyptic number.

12531637842 is an abundant number, since it is smaller than the sum of its proper divisors (13374069678).

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

12531637842 is a wasteful number, since it uses less digits than its factorization.

12531637842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88418.

The product of its digits is 241920, while the sum is 42.

The spelling of 12531637842 in words is "twelve billion, five hundred thirty-one million, six hundred thirty-seven thousand, eight hundred forty-two".