645332004253 has 8 divisors (see below), whose sum is σ = 654978934880. Its totient is φ = 635685518160.

The previous prime is 645332004241. The next prime is 645332004259. The reversal of 645332004253 is 352400233546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 645332004253 - 2¹³ = 645331996061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645332004259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3873358 + ... + 4036528.

It is an arithmetic number, because the mean of its divisors is an integer number (81872366860).

Almost surely, 2^645332004253 is an apocalyptic number.

It is an amenable number.

645332004253 is a deficient number, since it is larger than the sum of its proper divisors (9646930627).

645332004253 is a wasteful number, since it uses less digits than its factorization.

645332004253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222267.

The product of its (nonzero) digits is 259200, while the sum is 37.

Adding to 645332004253 its reverse (352400233546), we get a palindrome (997732237799).

The spelling of 645332004253 in words is "six hundred forty-five billion, three hundred thirty-two million, four thousand, two hundred fifty-three".