256142161000013 has 4 divisors (see below), whose sum is σ = 256159122948828. Its totient is φ = 256125199051200.

The previous prime is 256142160999979. The next prime is 256142161000031. The reversal of 256142161000013 is 310000161241652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 58132741017289 + 198009419982724 = 7624483^2 + 14071582^2 .

It is a cyclic number.

It is not a de Polignac number, because 256142161000013 - 2¹⁴ = 256142160983629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256142161000813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8480951756 + ... + 8480981957.

It is an arithmetic number, because the mean of its divisors is an integer number (64039780737207).

Almost surely, 2^{256142161000013} is an apocalyptic number.

It is an amenable number.

256142161000013 is a deficient number, since it is larger than the sum of its proper divisors (16961948815).

256142161000013 is a wasteful number, since it uses less digits than its factorization.

256142161000013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16961948814.

The product of its (nonzero) digits is 8640, while the sum is 32.

The spelling of 256142161000013 in words is "two hundred fifty-six trillion, one hundred forty-two billion, one hundred sixty-one million, thirteen", and thus it is an aban number.