55758865 has 4 divisors (see below), whose sum is σ = 66910644. Its totient is φ = 44607088.

The previous prime is 55758817. The next prime is 55758869. The reversal of 55758865 is 56885755.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56885755 = 5 ⋅11377151.

It can be written as a sum of positive squares in 2 ways, for example, as 13300609 + 42458256 = 3647^2 + 6516^2 .

It is a cyclic number.

It is not a de Polignac number, because 55758865 - 2²⁵ = 22204433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55758869) 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, 5575882 + ... + 5575891.

It is an arithmetic number, because the mean of its divisors is an integer number (16727661).

Almost surely, 2^55758865 is an apocalyptic number.

It is an amenable number.

55758865 is a deficient number, since it is larger than the sum of its proper divisors (11151779).

55758865 is a wasteful number, since it uses less digits than its factorization.

55758865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11151778.

The product of its digits is 1680000, while the sum is 49.

The square root of 55758865 is about 7467.1858822451. The cubic root of 55758865 is about 382.0363099720.

The spelling of 55758865 in words is "fifty-five million, seven hundred fifty-eight thousand, eight hundred sixty-five".