1366326381280 has 192 divisors, whose sum is σ = 3709837780992. Its totient is φ = 465823088640.

The previous prime is 1366326381253. The next prime is 1366326381293. The reversal of 1366326381280 is 821836236631.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 401033337 + ... + 401036743.

It is an arithmetic number, because the mean of its divisors is an integer number (19322071776).

Almost surely, 2^{1366326381280} is an apocalyptic number.

1366326381280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1366326381280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1854918890496).

1366326381280 is an abundant number, since it is smaller than the sum of its proper divisors (2343511399712).

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

1366326381280 is a wasteful number, since it uses less digits than its factorization.

1366326381280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5337 (or 5329 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 49.

The spelling of 1366326381280 in words is "one trillion, three hundred sixty-six billion, three hundred twenty-six million, three hundred eighty-one thousand, two hundred eighty".