56577533985 has 24 divisors (see below), whose sum is σ = 112077401280. Its totient is φ = 25864015392.

The previous prime is 56577533983. The next prime is 56577534023. The reversal of 56577533985 is 58933577565.

It is a happy number.

56577533985 is a `hidden beast` number, since 5 + 6 + 5 + 7 + 7 + 533 + 98 + 5 = 666.

It is not a de Polignac number, because 56577533985 - 2¹ = 56577533983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (56577533983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89805295 + ... + 89805924.

It is an arithmetic number, because the mean of its divisors is an integer number (4669891720).

Almost surely, 2^56577533985 is an apocalyptic number.

It is an amenable number.

56577533985 is a deficient number, since it is larger than the sum of its proper divisors (55499867295).

56577533985 is a wasteful number, since it uses less digits than its factorization.

56577533985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179611237 (or 179611234 counting only the distinct ones).

The product of its digits is 119070000, while the sum is 63.

The spelling of 56577533985 in words is "fifty-six billion, five hundred seventy-seven million, five hundred thirty-three thousand, nine hundred eighty-five".