55357569 has 6 divisors (see below), whose sum is σ = 79960946. Its totient is φ = 36905040.

The previous prime is 55357553. The next prime is 55357633. The reversal of 55357569 is 96575355.

55357569 is a `hidden beast` number, since 55 + 35 + 7 + 569 = 666.

It can be written as a sum of positive squares in only one way, i.e., 55353600 + 3969 = 7440^2 + 63^2 .

It is not a de Polignac number, because 55357569 - 2⁴ = 55357553 is a prime.

It is a super-2 number, since 2×55357569² = 6128920891179522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55357529) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3075412 + ... + 3075429.

Almost surely, 2^55357569 is an apocalyptic number.

It is an amenable number.

55357569 is a deficient number, since it is larger than the sum of its proper divisors (24603377).

55357569 is a wasteful number, since it uses less digits than its factorization.

55357569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6150847 (or 6150844 counting only the distinct ones).

The product of its digits is 708750, while the sum is 45.

The square root of 55357569 is about 7440.2667290898. The cubic root of 55357569 is about 381.1175986005.

The spelling of 55357569 in words is "fifty-five million, three hundred fifty-seven thousand, five hundred sixty-nine".