56610881 has 4 divisors (see below), whose sum is σ = 56628612. Its totient is φ = 56593152.

The previous prime is 56610863. The next prime is 56610887. The reversal of 56610881 is 18801665.

56610881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18801665 = 5 ⋅3760333.

It can be written as a sum of positive squares in 2 ways, for example, as 48720400 + 7890481 = 6980^2 + 2809^2 .

It is a cyclic number.

It is not a de Polignac number, because 56610881 - 2¹⁰ = 56609857 is a prime.

It is a super-2 number, since 2×56610881² = 6409583695192322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56610887) 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 3 ways as a sum of consecutive naturals, for example, 2600 + ... + 10953.

It is an arithmetic number, because the mean of its divisors is an integer number (14157153).

Almost surely, 2^56610881 is an apocalyptic number.

It is an amenable number.

56610881 is a deficient number, since it is larger than the sum of its proper divisors (17731).

56610881 is a wasteful number, since it uses less digits than its factorization.

56610881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17730.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 56610881 is about 7524.0202684469. The cubic root of 56610881 is about 383.9723671703.

The spelling of 56610881 in words is "fifty-six million, six hundred ten thousand, eight hundred eighty-one".