12366504615261 has 16 divisors (see below), whose sum is σ = 17266368738816. Its totient is φ = 7858021663536.

The previous prime is 12366504615253. The next prime is 12366504615287. The reversal of 12366504615261 is 16251640566321.

It is a happy number.

It is not a de Polignac number, because 12366504615261 - 2³ = 12366504615253 is a prime.

It is a super-2 number, since 2×12366504615261² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12366504615261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12366504615161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 316631895 + ... + 316670948.

It is an arithmetic number, because the mean of its divisors is an integer number (1079148046176).

Almost surely, 2^{12366504615261} is an apocalyptic number.

It is an amenable number.

12366504615261 is a deficient number, since it is larger than the sum of its proper divisors (4899864123555).

12366504615261 is a wasteful number, since it uses less digits than its factorization.

12366504615261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633303152.

The product of its (nonzero) digits is 1555200, while the sum is 48.

The spelling of 12366504615261 in words is "twelve trillion, three hundred sixty-six billion, five hundred four million, six hundred fifteen thousand, two hundred sixty-one".