1968426394264 has 64 divisors (see below), whose sum is σ = 4167855972000. Its totient is φ = 863328184320.

The previous prime is 1968426394247. The next prime is 1968426394289. The reversal of 1968426394264 is 4624936248691.

It is a junction number, because it is equal to n+sod(n) for n = 1968426394196 and 1968426394205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3714922 + ... + 4211590.

Almost surely, 2^{1968426394264} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1968426394264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2083927986000).

1968426394264 is an abundant number, since it is smaller than the sum of its proper divisors (2199429577736).

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

1968426394264 is a wasteful number, since it uses less digits than its factorization.

1968426394264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498268 (or 498264 counting only the distinct ones).

The product of its digits is 107495424, while the sum is 64.

The spelling of 1968426394264 in words is "one trillion, nine hundred sixty-eight billion, four hundred twenty-six million, three hundred ninety-four thousand, two hundred sixty-four".