56557272751 has 4 divisors (see below), whose sum is σ = 64636883152. Its totient is φ = 48477662352.

The previous prime is 56557272691. The next prime is 56557272787. The reversal of 56557272751 is 15727275565.

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

It is not a de Polignac number, because 56557272751 - 2¹¹ = 56557270703 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 (56557272451) 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, 4039805190 + ... + 4039805203.

It is an arithmetic number, because the mean of its divisors is an integer number (16159220788).

Almost surely, 2^56557272751 is an apocalyptic number.

56557272751 is a deficient number, since it is larger than the sum of its proper divisors (8079610401).

56557272751 is an equidigital number, since it uses as much as digits as its factorization.

56557272751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8079610400.

The product of its digits is 5145000, while the sum is 52.

The spelling of 56557272751 in words is "fifty-six billion, five hundred fifty-seven million, two hundred seventy-two thousand, seven hundred fifty-one".