56864561 has 8 divisors (see below), whose sum is σ = 61451880. Its totient is φ = 52307712.

The previous prime is 56864551. The next prime is 56864569. The reversal of 56864561 is 16546865.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 22278400 + 34586161 = 4720^2 + 5881^2 .

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 56864561 - 2¹⁰ = 56863537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56864569) 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, 3656 + ... + 11273.

It is an arithmetic number, because the mean of its divisors is an integer number (7681485).

Almost surely, 2^56864561 is an apocalyptic number.

It is an amenable number.

56864561 is a deficient number, since it is larger than the sum of its proper divisors (4587319).

56864561 is a wasteful number, since it uses less digits than its factorization.

56864561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15235.

The product of its digits is 172800, while the sum is 41.

The square root of 56864561 is about 7540.8594337781. The cubic root of 56864561 is about 384.5450543372.

The spelling of 56864561 in words is "fifty-six million, eight hundred sixty-four thousand, five hundred sixty-one".