68349900856 has 8 divisors (see below), whose sum is σ = 128156064120. Its totient is φ = 34174950424.

The previous prime is 68349900833. The next prime is 68349900869. The reversal of 68349900856 is 65800994386.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 68349900856.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4271868796 + ... + 4271868811.

It is an arithmetic number, because the mean of its divisors is an integer number (16019508015).

Almost surely, 2^68349900856 is an apocalyptic number.

It is an amenable number.

68349900856 is a deficient number, since it is larger than the sum of its proper divisors (59806163264).

68349900856 is a wasteful number, since it uses less digits than its factorization.

68349900856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8543737613 (or 8543737609 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 58.

The spelling of 68349900856 in words is "sixty-eight billion, three hundred forty-nine million, nine hundred thousand, eight hundred fifty-six".