12615817622 has 4 divisors (see below), whose sum is σ = 18923726436. Its totient is φ = 6307908810.

The previous prime is 12615817609. The next prime is 12615817639. The reversal of 12615817622 is 22671851621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22671851621 = 17597 ⋅1288393.

It is a self number, because there is not a number n which added to its sum of digits gives 12615817622.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3153954404 + ... + 3153954407.

It is an arithmetic number, because the mean of its divisors is an integer number (4730931609).

Almost surely, 2^12615817622 is an apocalyptic number.

12615817622 is a deficient number, since it is larger than the sum of its proper divisors (6307908814).

12615817622 is an equidigital number, since it uses as much as digits as its factorization.

12615817622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6307908813.

The product of its digits is 80640, while the sum is 41.

The spelling of 12615817622 in words is "twelve billion, six hundred fifteen million, eight hundred seventeen thousand, six hundred twenty-two".