64445600653 has 4 divisors (see below), whose sum is σ = 73652115040. Its totient is φ = 55239086268.

The previous prime is 64445600647. The next prime is 64445600689. The reversal of 64445600653 is 35600654446.

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 64445600653 - 2²⁵ = 64412046221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64445600603) 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, 4603257183 + ... + 4603257196.

It is an arithmetic number, because the mean of its divisors is an integer number (18413028760).

Almost surely, 2^64445600653 is an apocalyptic number.

It is an amenable number.

64445600653 is a deficient number, since it is larger than the sum of its proper divisors (9206514387).

64445600653 is an equidigital number, since it uses as much as digits as its factorization.

64445600653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9206514386.

The product of its (nonzero) digits is 1036800, while the sum is 43.

The spelling of 64445600653 in words is "sixty-four billion, four hundred forty-five million, six hundred thousand, six hundred fifty-three".