1366879769984 has 128 divisors (see below), whose sum is σ = 2915797500000. Its totient is φ = 636003975168.

The previous prime is 1366879769977. The next prime is 1366879769987. The reversal of 1366879769984 is 4899679786631.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1366879769987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118349042 + ... + 118360590.

Almost surely, 2^{1366879769984} 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 1366879769984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1457898750000).

1366879769984 is an abundant number, since it is smaller than the sum of its proper divisors (1548917730016).

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

1366879769984 is a wasteful number, since it uses less digits than its factorization.

1366879769984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12188 (or 12176 counting only the distinct ones).

The product of its digits is 5925685248, while the sum is 83.

The spelling of 1366879769984 in words is "one trillion, three hundred sixty-six billion, eight hundred seventy-nine million, seven hundred sixty-nine thousand, nine hundred eighty-four".