55406617 has 16 divisors (see below), whose sum is σ = 65894400. Its totient is φ = 45581760.

The previous prime is 55406599. The next prime is 55406639. The reversal of 55406617 is 71660455.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-55406617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55406657) 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, 38059 + ... + 39487.

It is an arithmetic number, because the mean of its divisors is an integer number (4118400).

Almost surely, 2^55406617 is an apocalyptic number.

It is an amenable number.

55406617 is a deficient number, since it is larger than the sum of its proper divisors (10487783).

55406617 is a wasteful number, since it uses less digits than its factorization.

55406617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1656.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 55406617 is about 7443.5621176961. The cubic root of 55406617 is about 381.2301248440.

The spelling of 55406617 in words is "fifty-five million, four hundred six thousand, six hundred seventeen".