645415051333 has 16 divisors (see below), whose sum is σ = 732463514496. Its totient is φ = 564222542400.

The previous prime is 645415051321. The next prime is 645415051339. The reversal of 645415051333 is 333150514546.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-645415051333 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 (645415051339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10655835 + ... + 10716232.

It is an arithmetic number, because the mean of its divisors is an integer number (45778969656).

Almost surely, 2^645415051333 is an apocalyptic number.

It is an amenable number.

645415051333 is a deficient number, since it is larger than the sum of its proper divisors (87048463163).

645415051333 is a wasteful number, since it uses less digits than its factorization.

645415051333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21372204.

The product of its (nonzero) digits is 324000, while the sum is 40.

Adding to 645415051333 its reverse (333150514546), we get a palindrome (978565565879).

The spelling of 645415051333 in words is "six hundred forty-five billion, four hundred fifteen million, fifty-one thousand, three hundred thirty-three".