56610205669 has 4 divisors (see below), whose sum is σ = 56755733580. Its totient is φ = 56464677760.

The previous prime is 56610205661. The next prime is 56610205727. The reversal of 56610205669 is 96650201665.

It is a happy number.

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 14277143169 + 42333062500 = 119487^2 + 205750^2 .

It is a cyclic number.

It is not a de Polignac number, because 56610205669 - 2³ = 56610205661 is a prime.

It is a super-2 number, since 2×56610205669² (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 (56610205661) 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, 72763372 + ... + 72764149.

It is an arithmetic number, because the mean of its divisors is an integer number (14188933395).

Almost surely, 2^56610205669 is an apocalyptic number.

It is an amenable number.

56610205669 is a deficient number, since it is larger than the sum of its proper divisors (145527911).

56610205669 is a wasteful number, since it uses less digits than its factorization.

56610205669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145527910.

The product of its (nonzero) digits is 583200, while the sum is 46.

The spelling of 56610205669 in words is "fifty-six billion, six hundred ten million, two hundred five thousand, six hundred sixty-nine".