68649450684 has 12 divisors (see below), whose sum is σ = 160182051624. Its totient is φ = 22883150224.

The previous prime is 68649450659. The next prime is 68649450703. The reversal of 68649450684 is 48605494686.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (60) 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 3 ways as a sum of consecutive naturals, for example, 2860393767 + ... + 2860393790.

It is an arithmetic number, because the mean of its divisors is an integer number (13348504302).

Almost surely, 2^68649450684 is an apocalyptic number.

It is an amenable number.

68649450684 is an abundant number, since it is smaller than the sum of its proper divisors (91532600940).

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

68649450684 is a wasteful number, since it uses less digits than its factorization.

68649450684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5720787564 (or 5720787562 counting only the distinct ones).

The product of its (nonzero) digits is 39813120, while the sum is 60.

The spelling of 68649450684 in words is "sixty-eight billion, six hundred forty-nine million, four hundred fifty thousand, six hundred eighty-four".