1396784455680 has 224 divisors, whose sum is σ = 4499492652000. Its totient is φ = 369971167232.

The previous prime is 1396784455679. The next prime is 1396784455709. The reversal of 1396784455680 is 865544876931.

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, 18270976 + ... + 18347264.

Almost surely, 2^{1396784455680} is an apocalyptic number.

1396784455680 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 1396784455680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2249746326000).

1396784455680 is an abundant number, since it is smaller than the sum of its proper divisors (3102708196320).

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

1396784455680 is an equidigital number, since it uses as much as digits as its factorization.

1396784455680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76472 (or 76448 counting only the distinct ones).

The product of its (nonzero) digits is 174182400, while the sum is 66.

The spelling of 1396784455680 in words is "one trillion, three hundred ninety-six billion, seven hundred eighty-four million, four hundred fifty-five thousand, six hundred eighty".