64513453 has 4 divisors (see below), whose sum is σ = 68308380. Its totient is φ = 60718528.

The previous prime is 64513441. The next prime is 64513481. The reversal of 64513453 is 35431546.

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 32228329 + 32285124 = 5677^2 + 5682^2 .

It is a cyclic number.

It is not a de Polignac number, because 64513453 - 2²¹ = 62416301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64513433) 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, 1897438 + ... + 1897471.

It is an arithmetic number, because the mean of its divisors is an integer number (17077095).

Almost surely, 2^64513453 is an apocalyptic number.

It is an amenable number.

64513453 is a deficient number, since it is larger than the sum of its proper divisors (3794927).

64513453 is a wasteful number, since it uses less digits than its factorization.

64513453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3794926.

The product of its digits is 21600, while the sum is 31.

The square root of 64513453 is about 8032.0267056329. The cubic root of 64513453 is about 401.0668458203.

Adding to 64513453 its reverse (35431546), we get a palindrome (99944999).

The spelling of 64513453 in words is "sixty-four million, five hundred thirteen thousand, four hundred fifty-three".