645221004233 has 8 divisors (see below), whose sum is σ = 699455069376. Its totient is φ = 591644322000.

The previous prime is 645221004229. The next prime is 645221004251. The reversal of 645221004233 is 332400122546.

645221004233 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 645221004233 - 2² = 645221004229 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 645221004233.

It is not an unprimeable number, because it can be changed into a prime (645221004433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164343683 + ... + 164347608.

It is an arithmetic number, because the mean of its divisors is an integer number (87431883672).

Almost surely, 2^645221004233 is an apocalyptic number.

It is an amenable number.

645221004233 is a deficient number, since it is larger than the sum of its proper divisors (54234065143).

645221004233 is a wasteful number, since it uses less digits than its factorization.

645221004233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328691455.

The product of its (nonzero) digits is 34560, while the sum is 32.

Adding to 645221004233 its reverse (332400122546), we get a palindrome (977621126779).

The spelling of 645221004233 in words is "six hundred forty-five billion, two hundred twenty-one million, four thousand, two hundred thirty-three".