1366982820864 has 264 divisors, whose sum is σ = 4170024597440. Its totient is φ = 430105116672.

The previous prime is 1366982820817. The next prime is 1366982820913. The reversal of 1366982820864 is 4680282896631.

1366982820864 is a `hidden beast` number, since 1 + 366 + 9 + 8 + 2 + 8 + 208 + 64 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48489717 + ... + 48517899.

Almost surely, 2^{1366982820864} 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 1366982820864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2085012298720).

1366982820864 is an abundant number, since it is smaller than the sum of its proper divisors (2803041776576).

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

1366982820864 is a wasteful number, since it uses less digits than its factorization.

1366982820864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28505 (or 28484 counting only the distinct ones).

The product of its (nonzero) digits is 47775744, while the sum is 63.

The spelling of 1366982820864 in words is "one trillion, three hundred sixty-six billion, nine hundred eighty-two million, eight hundred twenty thousand, eight hundred sixty-four".