55489565 has 16 divisors (see below), whose sum is σ = 69269376. Its totient is φ = 42638400.

The previous prime is 55489561. The next prime is 55489571. The reversal of 55489565 is 56598455.

It is not a de Polignac number, because 55489565 - 2² = 55489561 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55489561) 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, 11000 + ... + 15230.

It is an arithmetic number, because the mean of its divisors is an integer number (4329336).

Almost surely, 2^55489565 is an apocalyptic number.

It is an amenable number.

55489565 is a deficient number, since it is larger than the sum of its proper divisors (13779811).

55489565 is a wasteful number, since it uses less digits than its factorization.

55489565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4340.

The product of its digits is 1080000, while the sum is 47.

The square root of 55489565 is about 7449.1318286093. The cubic root of 55489565 is about 381.4202736679.

The spelling of 55489565 in words is "fifty-five million, four hundred eighty-nine thousand, five hundred sixty-five".