645441566414 has 16 divisors (see below), whose sum is σ = 969853415328. Its totient is φ = 322157227392.

The previous prime is 645441566369. The next prime is 645441566437. The reversal of 645441566414 is 414665144546.

645441566414 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

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, 11394887 + ... + 11451389.

It is an arithmetic number, because the mean of its divisors is an integer number (60615838458).

Almost surely, 2^645441566414 is an apocalyptic number.

645441566414 is a deficient number, since it is larger than the sum of its proper divisors (324411848914).

645441566414 is a wasteful number, since it uses less digits than its factorization.

645441566414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66379.

The product of its digits is 5529600, while the sum is 50.

The spelling of 645441566414 in words is "six hundred forty-five billion, four hundred forty-one million, five hundred sixty-six thousand, four hundred fourteen".