56823561887 has 4 divisors (see below), whose sum is σ = 56830705800. Its totient is φ = 56816417976.

The previous prime is 56823561859. The next prime is 56823561913. The reversal of 56823561887 is 78816532865.

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 56823561887 - 2¹⁰ = 56823560863 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 (56823561787) 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, 3560012 + ... + 3575937.

It is an arithmetic number, because the mean of its divisors is an integer number (14207676450).

Almost surely, 2^56823561887 is an apocalyptic number.

56823561887 is a deficient number, since it is larger than the sum of its proper divisors (7143913).

56823561887 is an equidigital number, since it uses as much as digits as its factorization.

56823561887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7143912.

The product of its digits is 19353600, while the sum is 59.

The spelling of 56823561887 in words is "fifty-six billion, eight hundred twenty-three million, five hundred sixty-one thousand, eight hundred eighty-seven".