68643456822 has 12 divisors (see below), whose sum is σ = 148727489820. Its totient is φ = 22881152268.

The previous prime is 68643456803. The next prime is 68643456857. The reversal of 68643456822 is 22865434686.

It is a happy number.

68643456822 is a `hidden beast` number, since 6 + 86 + 434 + 56 + 82 + 2 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1906762672 + ... + 1906762707.

It is an arithmetic number, because the mean of its divisors is an integer number (12393957485).

Almost surely, 2^68643456822 is an apocalyptic number.

68643456822 is an abundant number, since it is smaller than the sum of its proper divisors (80084032998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68643456822 is a wasteful number, since it uses less digits than its factorization.

68643456822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3813525387 (or 3813525384 counting only the distinct ones).

The product of its digits is 13271040, while the sum is 54.

The spelling of 68643456822 in words is "sixty-eight billion, six hundred forty-three million, four hundred fifty-six thousand, eight hundred twenty-two".