56091251959 has 4 divisors (see below), whose sum is σ = 56091981816. Its totient is φ = 56090522104.

The previous prime is 56091251947. The next prime is 56091251963. The reversal of 56091251959 is 95915219065.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95915219065 = 5 ⋅19183043813.

It is a cyclic number.

It is not a de Polignac number, because 56091251959 - 2¹¹ = 56091249911 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 (56091251939) 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, 233989 + ... + 408574.

It is an arithmetic number, because the mean of its divisors is an integer number (14022995454).

Almost surely, 2^56091251959 is an apocalyptic number.

56091251959 is a deficient number, since it is larger than the sum of its proper divisors (729857).

56091251959 is an equidigital number, since it uses as much as digits as its factorization.

56091251959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729856.

The product of its (nonzero) digits is 1093500, while the sum is 52.

The spelling of 56091251959 in words is "fifty-six billion, ninety-one million, two hundred fifty-one thousand, nine hundred fifty-nine".