12256515331155 has 32 divisors (see below), whose sum is σ = 22540717857600. Its totient is φ = 6311400996096.

The previous prime is 12256515331069. The next prime is 12256515331163. The reversal of 12256515331155 is 55113351565221.

12256515331155 is a `hidden beast` number, since 1 + 2 + 2 + 5 + 6 + 51 + 533 + 11 + 55 = 666.

It is not a de Polignac number, because 12256515331155 - 2¹⁰ = 12256515330131 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 12256515331155.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1565323714 + ... + 1565331543.

It is an arithmetic number, because the mean of its divisors is an integer number (704397433050).

Almost surely, 2^{12256515331155} is an apocalyptic number.

12256515331155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12256515331155 is a deficient number, since it is larger than the sum of its proper divisors (10284202526445).

12256515331155 is a wasteful number, since it uses less digits than its factorization.

12256515331155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3130655300 (or 3130655294 counting only the distinct ones).

The product of its digits is 675000, while the sum is 45.

Adding to 12256515331155 its reverse (55113351565221), we get a palindrome (67369866896376).

The spelling of 12256515331155 in words is "twelve trillion, two hundred fifty-six billion, five hundred fifteen million, three hundred thirty-one thousand, one hundred fifty-five".