68109626456 has 16 divisors (see below), whose sum is σ = 128166584640. Its totient is φ = 33931870560.

The previous prime is 68109626407. The next prime is 68109626513. The reversal of 68109626456 is 65462690186.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 68109626398 and 68109626407.

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, 15365480 + ... + 15369911.

It is an arithmetic number, because the mean of its divisors is an integer number (8010411540).

Almost surely, 2^68109626456 is an apocalyptic number.

It is an amenable number.

68109626456 is a deficient number, since it is larger than the sum of its proper divisors (60056958184).

68109626456 is a wasteful number, since it uses less digits than its factorization.

68109626456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30735674 (or 30735670 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 53.

The spelling of 68109626456 in words is "sixty-eight billion, one hundred nine million, six hundred twenty-six thousand, four hundred fifty-six".