1381386363864 has 32 divisors (see below), whose sum is σ = 3719117134320. Its totient is φ = 425041958016.

The previous prime is 1381386363829. The next prime is 1381386363871. The reversal of 1381386363864 is 4683636831831.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1381386363798 and 1381386363807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2213759887 + ... + 2213760510.

Almost surely, 2^{1381386363864} is an apocalyptic number.

It is an amenable number.

1381386363864 is an abundant number, since it is smaller than the sum of its proper divisors (2337730770456).

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

1381386363864 is a wasteful number, since it uses less digits than its factorization.

1381386363864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4427520419 (or 4427520415 counting only the distinct ones).

The product of its digits is 35831808, while the sum is 60.

The spelling of 1381386363864 in words is "one trillion, three hundred eighty-one billion, three hundred eighty-six million, three hundred sixty-three thousand, eight hundred sixty-four".