55566511565 has 16 divisors (see below), whose sum is σ = 70431499776. Its totient is φ = 42018782400.

The previous prime is 55566511547. The next prime is 55566511589. The reversal of 55566511565 is 56511566555.

55566511565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55566511565 - 2⁶ = 55566511501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4161866 + ... + 4175195.

It is an arithmetic number, because the mean of its divisors is an integer number (4401968736).

Almost surely, 2^55566511565 is an apocalyptic number.

It is an amenable number.

55566511565 is a deficient number, since it is larger than the sum of its proper divisors (14864988211).

55566511565 is a wasteful number, since it uses less digits than its factorization.

55566511565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8337140.

The product of its digits is 3375000, while the sum is 50.

The spelling of 55566511565 in words is "fifty-five billion, five hundred sixty-six million, five hundred eleven thousand, five hundred sixty-five".