56577556487 has 4 divisors (see below), whose sum is σ = 56578601976. Its totient is φ = 56576511000.

The previous prime is 56577556463. The next prime is 56577556493. The reversal of 56577556487 is 78465577565.

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 56577556487 - 2¹² = 56577552391 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 (56577556417) 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, 436868 + ... + 551369.

It is an arithmetic number, because the mean of its divisors is an integer number (14144650494).

Almost surely, 2^56577556487 is an apocalyptic number.

56577556487 is a deficient number, since it is larger than the sum of its proper divisors (1045489).

56577556487 is an equidigital number, since it uses as much as digits as its factorization.

56577556487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045488.

The product of its digits is 246960000, while the sum is 65.

The spelling of 56577556487 in words is "fifty-six billion, five hundred seventy-seven million, five hundred fifty-six thousand, four hundred eighty-seven".