12616266555 has 12 divisors (see below), whose sum is σ = 21868195440. Its totient is φ = 6728675472.

The previous prime is 12616266503. The next prime is 12616266563. The reversal of 12616266555 is 55566261621.

12616266555 is a `hidden beast` number, since 1 + 2 + 616 + 26 + 6 + 5 + 5 + 5 = 666.

It is not a de Polignac number, because 12616266555 - 2¹⁸ = 12616004411 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 280361479 = 12616266555 / (1 + 2 + 6 + 1 + 6 + 2 + 6 + 6 + 5 + 5 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 12616266555.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 140180695 + ... + 140180784.

It is an arithmetic number, because the mean of its divisors is an integer number (1822349620).

Almost surely, 2^12616266555 is an apocalyptic number.

12616266555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12616266555 is a deficient number, since it is larger than the sum of its proper divisors (9251928885).

12616266555 is a wasteful number, since it uses less digits than its factorization.

12616266555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280361490 (or 280361487 counting only the distinct ones).

The product of its digits is 648000, while the sum is 45.

The spelling of 12616266555 in words is "twelve billion, six hundred sixteen million, two hundred sixty-six thousand, five hundred fifty-five".