645344400313630 has 16 divisors (see below), whose sum is σ = 1161925368942384. Its totient is φ = 258069882708160.

The previous prime is 645344400313621. The next prime is 645344400313681. The reversal of 645344400313630 is 36313004443546.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8484637231 + ... + 8484713290.

It is an arithmetic number, because the mean of its divisors is an integer number (72620335558899).

Almost surely, 2^{645344400313630} is an apocalyptic number.

645344400313630 is a deficient number, since it is larger than the sum of its proper divisors (516580968628754).

645344400313630 is a wasteful number, since it uses less digits than its factorization.

645344400313630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16969354331.

The product of its (nonzero) digits is 3732480, while the sum is 46.

The spelling of 645344400313630 in words is "six hundred forty-five trillion, three hundred forty-four billion, four hundred million, three hundred thirteen thousand, six hundred thirty".