645413336 has 8 divisors (see below), whose sum is σ = 1210150020. Its totient is φ = 322706664.

The previous prime is 645413323. The next prime is 645413339. The reversal of 645413336 is 633314546.

645413336 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 645413296 and 645413305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645413339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40338326 + ... + 40338341.

Almost surely, 2^645413336 is an apocalyptic number.

It is an amenable number.

645413336 is a deficient number, since it is larger than the sum of its proper divisors (564736684).

645413336 is a wasteful number, since it uses less digits than its factorization.

645413336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80676673 (or 80676669 counting only the distinct ones).

The product of its digits is 77760, while the sum is 35.

The square root of 645413336 is about 25404.9864396736. The cubic root of 645413336 is about 864.1967823099.

The spelling of 645413336 in words is "six hundred forty-five million, four hundred thirteen thousand, three hundred thirty-six".