67798722390 has 128 divisors (see below), whose sum is σ = 196059709440. Its totient is φ = 14657977728.

The previous prime is 67798722373. The next prime is 67798722419. The reversal of 67798722390 is 9322789776.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2568399 + ... + 2594661.

It is an arithmetic number, because the mean of its divisors is an integer number (1531716480).

Almost surely, 2^67798722390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67798722390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98029854720).

67798722390 is an abundant number, since it is smaller than the sum of its proper divisors (128260987050).

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

67798722390 is a wasteful number, since it uses less digits than its factorization.

67798722390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26946.

The product of its (nonzero) digits is 16003008, while the sum is 60.

The spelling of 67798722390 in words is "sixty-seven billion, seven hundred ninety-eight million, seven hundred twenty-two thousand, three hundred ninety".