55610689 has 4 divisors (see below), whose sum is σ = 58881924. Its totient is φ = 52339456.

The previous prime is 55610657. The next prime is 55610693. The reversal of 55610689 is 98601655.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98601655 = 5 ⋅19720331.

It can be written as a sum of positive squares in 2 ways, for example, as 19430464 + 36180225 = 4408^2 + 6015^2 .

It is a cyclic number.

It is not a de Polignac number, because 55610689 - 2⁵ = 55610657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55610609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1635592 + ... + 1635625.

It is an arithmetic number, because the mean of its divisors is an integer number (14720481).

Almost surely, 2^55610689 is an apocalyptic number.

It is an amenable number.

55610689 is a deficient number, since it is larger than the sum of its proper divisors (3271235).

55610689 is a wasteful number, since it uses less digits than its factorization.

55610689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3271234.

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 55610689 is about 7457.2574717519. The cubic root of 55610689 is about 381.6975965306.

The spelling of 55610689 in words is "fifty-five million, six hundred ten thousand, six hundred eighty-nine".