55558617 has 16 divisors (see below), whose sum is σ = 75673728. Its totient is φ = 36247680.

The previous prime is 55558609. The next prime is 55558619. The reversal of 55558617 is 71685555.

It is not a de Polignac number, because 55558617 - 2³ = 55558609 is a prime.

It is a super-3 number, since 3×55558617³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (55558619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41988 + ... + 43290.

It is an arithmetic number, because the mean of its divisors is an integer number (4729608).

Almost surely, 2^55558617 is an apocalyptic number.

It is an amenable number.

55558617 is a deficient number, since it is larger than the sum of its proper divisors (20115111).

55558617 is a wasteful number, since it uses less digits than its factorization.

55558617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1600.

The product of its digits is 210000, while the sum is 42.

The square root of 55558617 is about 7453.7652901067. The cubic root of 55558617 is about 381.5784230138.

The spelling of 55558617 in words is "fifty-five million, five hundred fifty-eight thousand, six hundred seventeen".