645441040364 has 12 divisors (see below), whose sum is σ = 1129691134824. Its totient is φ = 322672144704.

The previous prime is 645441040339. The next prime is 645441040397. The reversal of 645441040364 is 463040144546.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12063842 + ... + 12117225.

It is an arithmetic number, because the mean of its divisors is an integer number (94140927902).

Almost surely, 2^645441040364 is an apocalyptic number.

It is an amenable number.

645441040364 is a deficient number, since it is larger than the sum of its proper divisors (484250094460).

645441040364 is a wasteful number, since it uses less digits than its factorization.

645441040364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24187744 (or 24187742 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 41.

The spelling of 645441040364 in words is "six hundred forty-five billion, four hundred forty-one million, forty thousand, three hundred sixty-four".