55089765 has 12 divisors (see below), whose sum is σ = 95489004. Its totient is φ = 29381184.

The previous prime is 55089757. The next prime is 55089787. The reversal of 55089765 is 56798055.

55089765 is a `hidden beast` number, since 550 + 8 + 97 + 6 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 11410884 + 43678881 = 3378^2 + 6609^2 .

It is not a de Polignac number, because 55089765 - 2³ = 55089757 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1224217 = 55089765 / (5 + 5 + 0 + 8 + 9 + 7 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 55089765.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 612064 + ... + 612153.

It is an arithmetic number, because the mean of its divisors is an integer number (7957417).

Almost surely, 2^55089765 is an apocalyptic number.

It is an amenable number.

55089765 is a deficient number, since it is larger than the sum of its proper divisors (40399239).

55089765 is a wasteful number, since it uses less digits than its factorization.

55089765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224228 (or 1224225 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 45.

The square root of 55089765 is about 7422.2479748389. The cubic root of 55089765 is about 380.5020257605.

The spelling of 55089765 in words is "fifty-five million, eighty-nine thousand, seven hundred sixty-five".