53564018 has 4 divisors (see below), whose sum is σ = 80346030. Its totient is φ = 26782008.

The previous prime is 53564011. The next prime is 53564029. The reversal of 53564018 is 81046535.

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 only one way, i.e., 52896529 + 667489 = 7273^2 + 817^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (53564011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13391003 + ... + 13391006.

Almost surely, 2^53564018 is an apocalyptic number.

53564018 is a deficient number, since it is larger than the sum of its proper divisors (26782012).

53564018 is a wasteful number, since it uses less digits than its factorization.

53564018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26782011.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 53564018 is about 7318.7442912019. The cubic root of 53564018 is about 376.9563374210.

The spelling of 53564018 in words is "fifty-three million, five hundred sixty-four thousand, eighteen".