645373868822 has 8 divisors (see below), whose sum is σ = 968256109776. Its totient is φ = 322621832232.

The previous prime is 645373868809. The next prime is 645373868837. The reversal of 645373868822 is 228868373546.

645373868822 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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, 32538698 + ... + 32558525.

It is an arithmetic number, because the mean of its divisors is an integer number (121032013722).

Almost surely, 2^645373868822 is an apocalyptic number.

645373868822 is a deficient number, since it is larger than the sum of its proper divisors (322882240954).

645373868822 is a wasteful number, since it uses less digits than its factorization.

645373868822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65102182.

The product of its digits is 92897280, while the sum is 62.

The spelling of 645373868822 in words is "six hundred forty-five billion, three hundred seventy-three million, eight hundred sixty-eight thousand, eight hundred twenty-two".