55565613 has 6 divisors (see below), whose sum is σ = 80261454. Its totient is φ = 37043736.

The previous prime is 55565611. The next prime is 55565617. The reversal of 55565613 is 31656555.

It can be written as a sum of positive squares in only one way, i.e., 53187849 + 2377764 = 7293^2 + 1542^2 .

It is not a de Polignac number, because 55565613 - 2¹ = 55565611 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55565611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3086970 + ... + 3086987.

It is an arithmetic number, because the mean of its divisors is an integer number (13376909).

Almost surely, 2^55565613 is an apocalyptic number.

It is an amenable number.

55565613 is a deficient number, since it is larger than the sum of its proper divisors (24695841).

55565613 is a wasteful number, since it uses less digits than its factorization.

55565613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6173963 (or 6173960 counting only the distinct ones).

The product of its digits is 67500, while the sum is 36.

The square root of 55565613 is about 7454.2345683511. The cubic root of 55565613 is about 381.5944385949.

The spelling of 55565613 in words is "fifty-five million, five hundred sixty-five thousand, six hundred thirteen".