6645240453 has 16 divisors (see below), whose sum is σ = 8920106496. Its totient is φ = 4400308080.

The previous prime is 6645240419. The next prime is 6645240461. The reversal of 6645240453 is 3540425466.

It is not a de Polignac number, because 6645240453 - 2²⁰ = 6644191877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6645240403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 782850 + ... + 791292.

It is an arithmetic number, because the mean of its divisors is an integer number (557506656).

Almost surely, 2^6645240453 is an apocalyptic number.

It is an amenable number.

6645240453 is a deficient number, since it is larger than the sum of its proper divisors (2274866043).

6645240453 is a wasteful number, since it uses less digits than its factorization.

6645240453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10184.

The product of its (nonzero) digits is 345600, while the sum is 39.

The square root of 6645240453 is about 81518.3442729304. The cubic root of 6645240453 is about 1880.0536099282.

The spelling of 6645240453 in words is "six billion, six hundred forty-five million, two hundred forty thousand, four hundred fifty-three".