12616981057522 has 8 divisors (see below), whose sum is σ = 18926333428572. Its totient is φ = 6308203248000.

The previous prime is 12616981057511. The next prime is 12616981057537. The reversal of 12616981057522 is 22575018961621.

It is a happy number.

It is a Cunningham number, because it is equal to 3552039²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 12616981057521 + 1 = 3552039^2 + 1^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×12616981057522² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143585479 + ... + 143673322.

Almost surely, 2^{12616981057522} is an apocalyptic number.

12616981057522 is a deficient number, since it is larger than the sum of its proper divisors (6309352371050).

12616981057522 is a wasteful number, since it uses less digits than its factorization.

12616981057522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287280764.

The product of its (nonzero) digits is 3628800, while the sum is 55.

The spelling of 12616981057522 in words is "twelve trillion, six hundred sixteen billion, nine hundred eighty-one million, fifty-seven thousand, five hundred twenty-two".