56278511791 has 4 divisors (see below), whose sum is σ = 58725403632. Its totient is φ = 53831619952.

The previous prime is 56278511777. The next prime is 56278511819. The reversal of 56278511791 is 19711587265.

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 56278511791 - 2⁵ = 56278511759 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 (56278511701) 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, 1223445886 + ... + 1223445931.

It is an arithmetic number, because the mean of its divisors is an integer number (14681350908).

Almost surely, 2^56278511791 is an apocalyptic number.

56278511791 is a deficient number, since it is larger than the sum of its proper divisors (2446891841).

56278511791 is a wasteful number, since it uses less digits than its factorization.

56278511791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2446891840.

The product of its digits is 1058400, while the sum is 52.

The spelling of 56278511791 in words is "fifty-six billion, two hundred seventy-eight million, five hundred eleven thousand, seven hundred ninety-one".