256101562553 has 4 divisors (see below), whose sum is σ = 256108922448. Its totient is φ = 256094202660.

The previous prime is 256101562501. The next prime is 256101562573. The reversal of 256101562553 is 355265101652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 256101562553 - 2¹² = 256101558457 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 256101562553.

It is not an unprimeable number, because it can be changed into a prime (256101562573) 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, 3627503 + ... + 3697428.

It is an arithmetic number, because the mean of its divisors is an integer number (64027230612).

Almost surely, 2^256101562553 is an apocalyptic number.

It is an amenable number.

256101562553 is a deficient number, since it is larger than the sum of its proper divisors (7359895).

256101562553 is an equidigital number, since it uses as much as digits as its factorization.

256101562553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7359894.

The product of its (nonzero) digits is 270000, while the sum is 41.

The spelling of 256101562553 in words is "two hundred fifty-six billion, one hundred one million, five hundred sixty-two thousand, five hundred fifty-three".