56561355885 has 16 divisors (see below), whose sum is σ = 90526343040. Its totient is φ = 30156665280.

The previous prime is 56561355883. The next prime is 56561355913. The reversal of 56561355885 is 58855316565.

It is not a de Polignac number, because 56561355885 - 2¹ = 56561355883 is a prime.

It is a super-3 number, since 3×56561355885³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56561355883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 537025 + ... + 633654.

It is an arithmetic number, because the mean of its divisors is an integer number (5657896440).

Almost surely, 2^56561355885 is an apocalyptic number.

It is an amenable number.

56561355885 is a deficient number, since it is larger than the sum of its proper divisors (33964987155).

56561355885 is a wasteful number, since it uses less digits than its factorization.

56561355885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1173908.

The product of its digits is 21600000, while the sum is 57.

The spelling of 56561355885 in words is "fifty-six billion, five hundred sixty-one million, three hundred fifty-five thousand, eight hundred eighty-five".