64440233204445 has 96 divisors (see below), whose sum is σ = 129636530030592. Its totient is φ = 29004040469376.

The previous prime is 64440233204437. The next prime is 64440233204507. The reversal of 64440233204445 is 54440233204446.

64440233204445 is a `hidden beast` number, since 6 + 4 + 4 + 402 + 33 + 204 + 4 + 4 + 5 = 666.

It is not a de Polignac number, because 64440233204445 - 2³ = 64440233204437 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 64440233204445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 370777 + ... + 11358606.

It is an arithmetic number, because the mean of its divisors is an integer number (1350380521152).

Almost surely, 2^{64440233204445} is an apocalyptic number.

It is an amenable number.

64440233204445 is an abundant number, since it is smaller than the sum of its proper divisors (65196296826147).

64440233204445 is a wasteful number, since it uses less digits than its factorization.

64440233204445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11729671 (or 11729668 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 45.

Subtracting from 64440233204445 its reverse (54440233204446), we obtain a palindrome (9999999999999).

The spelling of 64440233204445 in words is "sixty-four trillion, four hundred forty billion, two hundred thirty-three million, two hundred four thousand, four hundred forty-five".