12502442157861 has 4 divisors (see below), whose sum is σ = 16669922877152. Its totient is φ = 8334961438572.

The previous prime is 12502442157857. The next prime is 12502442157869. The reversal of 12502442157861 is 16875124420521.

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 12502442157861 - 2² = 12502442157857 is a prime.

It is a super-2 number, since 2×12502442157861² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12502442157861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12502442157869) 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, 2083740359641 + ... + 2083740359646.

It is an arithmetic number, because the mean of its divisors is an integer number (4167480719288).

Almost surely, 2^{12502442157861} is an apocalyptic number.

It is an amenable number.

12502442157861 is a deficient number, since it is larger than the sum of its proper divisors (4167480719291).

12502442157861 is an equidigital number, since it uses as much as digits as its factorization.

12502442157861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4167480719290.

The product of its (nonzero) digits is 1075200, while the sum is 48.

The spelling of 12502442157861 in words is "twelve trillion, five hundred two billion, four hundred forty-two million, one hundred fifty-seven thousand, eight hundred sixty-one".