56566388069 has 4 divisors (see below), whose sum is σ = 56571392460. Its totient is φ = 56561383680.

The previous prime is 56566388033. The next prime is 56566388077. The reversal of 56566388069 is 96088366565.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40597011169 + 15969376900 = 201487^2 + 126370^2 .

It is a cyclic number.

It is not a de Polignac number, because 56566388069 - 2²⁴ = 56549610853 is a prime.

It is a super-2 number, since 2×56566388069² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56566388029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2485202 + ... + 2507859.

It is an arithmetic number, because the mean of its divisors is an integer number (14142848115).

Almost surely, 2^56566388069 is an apocalyptic number.

It is an amenable number.

56566388069 is a deficient number, since it is larger than the sum of its proper divisors (5004391).

56566388069 is a wasteful number, since it uses less digits than its factorization.

56566388069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5004390.

The product of its (nonzero) digits is 55987200, while the sum is 62.

The spelling of 56566388069 in words is "fifty-six billion, five hundred sixty-six million, three hundred eighty-eight thousand, sixty-nine".