1369280816640 has 560 divisors, whose sum is σ = 5369911745616. Its totient is φ = 331941888000.

The previous prime is 1369280816639. The next prime is 1369280816699. The reversal of 1369280816640 is 466180829631.

1369280816640 is a `hidden beast` number, since 1 + 369 + 2 + 80 + 8 + 166 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 20495290 + ... + 20561990.

Almost surely, 2^{1369280816640} is an apocalyptic number.

1369280816640 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 1369280816640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2684955872808).

1369280816640 is an abundant number, since it is smaller than the sum of its proper divisors (4000630928976).

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

1369280816640 is an frugal number, since it uses more digits than its factorization.

1369280816640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66753 (or 66722 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 54.

The spelling of 1369280816640 in words is "one trillion, three hundred sixty-nine billion, two hundred eighty million, eight hundred sixteen thousand, six hundred forty".