56259626591 has 4 divisors (see below), whose sum is σ = 64296716112. Its totient is φ = 48222537072.

The previous prime is 56259626569. The next prime is 56259626593. The reversal of 56259626591 is 19562695265.

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

It is a cyclic number.

It is not a de Polignac number, because 56259626591 - 2¹⁰ = 56259625567 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 (56259626593) 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, 4018544750 + ... + 4018544763.

It is an arithmetic number, because the mean of its divisors is an integer number (16074179028).

Almost surely, 2^56259626591 is an apocalyptic number.

56259626591 is a deficient number, since it is larger than the sum of its proper divisors (8037089521).

56259626591 is an equidigital number, since it uses as much as digits as its factorization.

56259626591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8037089520.

The product of its digits is 8748000, while the sum is 56.

The spelling of 56259626591 in words is "fifty-six billion, two hundred fifty-nine million, six hundred twenty-six thousand, five hundred ninety-one".