55601765 has 4 divisors (see below), whose sum is σ = 66722124. Its totient is φ = 44481408.

The previous prime is 55601753. The next prime is 55601779. The reversal of 55601765 is 56710655.

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 9443329 + 46158436 = 3073^2 + 6794^2 .

It is a cyclic number.

It is not a de Polignac number, because 55601765 - 2²⁰ = 54553189 is a prime.

It is a super-2 number, since 2×55601765² = 6183112542230450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5560172 + ... + 5560181.

It is an arithmetic number, because the mean of its divisors is an integer number (16680531).

Almost surely, 2^55601765 is an apocalyptic number.

It is an amenable number.

55601765 is a deficient number, since it is larger than the sum of its proper divisors (11120359).

55601765 is a wasteful number, since it uses less digits than its factorization.

55601765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11120358.

The product of its (nonzero) digits is 31500, while the sum is 35.

The square root of 55601765 is about 7456.6591044515. The cubic root of 55601765 is about 381.6771780845.

The spelling of 55601765 in words is "fifty-five million, six hundred one thousand, seven hundred sixty-five".