12256436620461 has 32 divisors (see below), whose sum is σ = 17903086525440. Its totient is φ = 7396727356800.

The previous prime is 12256436620447. The next prime is 12256436620507. The reversal of 12256436620461 is 16402663465221.

It is not a de Polignac number, because 12256436620461 - 2³⁴ = 12239256751277 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12256436620461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12256436620061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7437681 + ... + 8934873.

It is an arithmetic number, because the mean of its divisors is an integer number (559471453920).

Almost surely, 2^{12256436620461} is an apocalyptic number.

12256436620461 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12256436620461 is a deficient number, since it is larger than the sum of its proper divisors (5646649904979).

12256436620461 is a wasteful number, since it uses less digits than its factorization.

12256436620461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1498257.

The product of its (nonzero) digits is 2488320, while the sum is 48.

The spelling of 12256436620461 in words is "twelve trillion, two hundred fifty-six billion, four hundred thirty-six million, six hundred twenty thousand, four hundred sixty-one".