12502422561 has 4 divisors (see below), whose sum is σ = 16669896752. Its totient is φ = 8334948372.

The previous prime is 12502422533. The next prime is 12502422601. The reversal of 12502422561 is 16522420521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12502422561 - 2¹³ = 12502414369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12502422521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2083737091 + ... + 2083737096.

It is an arithmetic number, because the mean of its divisors is an integer number (4167474188).

Almost surely, 2^12502422561 is an apocalyptic number.

It is an amenable number.

12502422561 is a deficient number, since it is larger than the sum of its proper divisors (4167474191).

12502422561 is an equidigital number, since it uses as much as digits as its factorization.

12502422561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4167474190.

The product of its (nonzero) digits is 9600, while the sum is 30.

The spelling of 12502422561 in words is "twelve billion, five hundred two million, four hundred twenty-two thousand, five hundred sixty-one".