55865085361 has 4 divisors (see below), whose sum is σ = 56082459492. Its totient is φ = 55647711232.

The previous prime is 55865085349. The next prime is 55865085379. The reversal of 55865085361 is 16358056855.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53798019136 + 2067066225 = 231944^2 + 45465^2 .

It is a cyclic number.

It is not a de Polignac number, because 55865085361 - 2⁷ = 55865085233 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55865085299 and 55865085308.

It is not an unprimeable number, because it can be changed into a prime (55865055361) 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, 108686680 + ... + 108687193.

It is an arithmetic number, because the mean of its divisors is an integer number (14020614873).

Almost surely, 2^55865085361 is an apocalyptic number.

It is an amenable number.

55865085361 is a deficient number, since it is larger than the sum of its proper divisors (217374131).

55865085361 is a wasteful number, since it uses less digits than its factorization.

55865085361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217374130.

The product of its (nonzero) digits is 4320000, while the sum is 52.

The spelling of 55865085361 in words is "fifty-five billion, eight hundred sixty-five million, eighty-five thousand, three hundred sixty-one".