56561011 has 8 divisors (see below), whose sum is σ = 60997104. Its totient is φ = 52137120.

The previous prime is 56561003. The next prime is 56561027. The reversal of 56561011 is 11016565.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56561011 - 2³ = 56561003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56561041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8121 + ... + 13381.

It is an arithmetic number, because the mean of its divisors is an integer number (7624638).

Almost surely, 2^56561011 is an apocalyptic number.

56561011 is a deficient number, since it is larger than the sum of its proper divisors (4436093).

56561011 is a wasteful number, since it uses less digits than its factorization.

56561011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6101.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 56561011 is about 7520.7054855246. The cubic root of 56561011 is about 383.8595836251.

Adding to 56561011 its reverse (11016565), we get a palindrome (67577576).

The spelling of 56561011 in words is "fifty-six million, five hundred sixty-one thousand, eleven".