55645593 has 4 divisors (see below), whose sum is σ = 74194128. Its totient is φ = 37097060.

The previous prime is 55645591. The next prime is 55645621. The reversal of 55645593 is 39554655.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55645593 - 2¹ = 55645591 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55645591) 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, 9274263 + ... + 9274268.

It is an arithmetic number, because the mean of its divisors is an integer number (18548532).

Almost surely, 2^55645593 is an apocalyptic number.

It is an amenable number.

55645593 is a deficient number, since it is larger than the sum of its proper divisors (18548535).

55645593 is a wasteful number, since it uses less digits than its factorization.

55645593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18548534.

The product of its digits is 405000, while the sum is 42.

The square root of 55645593 is about 7459.5973751939. The cubic root of 55645593 is about 381.7774372158. Note that the first 3 decimals are identical.

The spelling of 55645593 in words is "fifty-five million, six hundred forty-five thousand, five hundred ninety-three".