68401049856 has 72 divisors (see below), whose sum is σ = 192755201184. Its totient is φ = 21459148800.

The previous prime is 68401049819. The next prime is 68401049879. The reversal of 68401049856 is 65894010486.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 68401049799 and 68401049808.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2606470 + ... + 2632581.

It is an arithmetic number, because the mean of its divisors is an integer number (2677155572).

Almost surely, 2^68401049856 is an apocalyptic number.

It is an amenable number.

68401049856 is an abundant number, since it is smaller than the sum of its proper divisors (124354151328).

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

68401049856 is a wasteful number, since it uses less digits than its factorization.

68401049856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5239087 (or 5239073 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 51.

It can be divided in two parts, 684010 and 49856, that added together give a triangular number (733866 = T₁₂₁₁).

The spelling of 68401049856 in words is "sixty-eight billion, four hundred one million, forty-nine thousand, eight hundred fifty-six".