5655780875565 has 24 divisors (see below), whose sum is σ = 9803486624568. Its totient is φ = 3016375511040.

The previous prime is 5655780875561. The next prime is 5655780875573.

5655780875565 is a `hidden beast` number, since 5 + 6 + 5 + 57 + 8 + 0 + 8 + 7 + 5 + 565 = 666.

5655780875565 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 1094745782601 + 4561035092964 = 1046301^2 + 2135658^2 .

It is not a de Polignac number, because 5655780875565 - 2² = 5655780875561 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 5655780875493 and 5655780875502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5655780875561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2656485 + ... + 4285845.

It is an arithmetic number, because the mean of its divisors is an integer number (408478609357).

Almost surely, 2^{5655780875565} is an apocalyptic number.

It is an amenable number.

5655780875565 is a deficient number, since it is larger than the sum of its proper divisors (4147705749003).

5655780875565 is a wasteful number, since it uses less digits than its factorization.

5655780875565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1706509 (or 1706506 counting only the distinct ones).

The product of its (nonzero) digits is 1764000000, while the sum is 72.

The spelling of 5655780875565 in words is "five trillion, six hundred fifty-five billion, seven hundred eighty million, eight hundred seventy-five thousand, five hundred sixty-five".