56163809 has 8 divisors (see below), whose sum is σ = 61959912. Its totient is φ = 50578560.

The previous prime is 56163803. The next prime is 56163827. The reversal of 56163809 is 90836165.

It can be written as a sum of positive squares in 4 ways, for example, as 6390784 + 49773025 = 2528^2 + 7055^2 .

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 56163809 - 2⁸ = 56163553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56163803) 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, 52154 + ... + 53219.

It is an arithmetic number, because the mean of its divisors is an integer number (7744989).

Almost surely, 2^56163809 is an apocalyptic number.

It is an amenable number.

56163809 is a deficient number, since it is larger than the sum of its proper divisors (5796103).

56163809 is a wasteful number, since it uses less digits than its factorization.

56163809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105427.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 56163809 is about 7494.2517304932. The cubic root of 56163809 is about 382.9589154848.

The spelling of 56163809 in words is "fifty-six million, one hundred sixty-three thousand, eight hundred nine".