53644863 has 4 divisors (see below), whose sum is σ = 71526488. Its totient is φ = 35763240.

The previous prime is 53644861. The next prime is 53644883. The reversal of 53644863 is 36844635.

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

It is not a de Polignac number, because 53644863 - 2¹ = 53644861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53644861) 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, 8940808 + ... + 8940813.

It is an arithmetic number, because the mean of its divisors is an integer number (17881622).

Almost surely, 2^53644863 is an apocalyptic number.

53644863 is a deficient number, since it is larger than the sum of its proper divisors (17881625).

53644863 is a wasteful number, since it uses less digits than its factorization.

53644863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17881624.

The product of its digits is 207360, while the sum is 39.

The square root of 53644863 is about 7324.2653556517. The cubic root of 53644863 is about 377.1458907625.

The spelling of 53644863 in words is "fifty-three million, six hundred forty-four thousand, eight hundred sixty-three".