1386821522989 has 24 divisors (see below), whose sum is σ = 1623958266528. Its totient is φ = 1180814876640.

The previous prime is 1386821522981. The next prime is 1386821523049. The reversal of 1386821522989 is 9892251286831.

It is not a de Polignac number, because 1386821522989 - 2³ = 1386821522981 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1386821522989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1386821522981) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16146819 + ... + 16232479.

It is an arithmetic number, because the mean of its divisors is an integer number (67664927772).

Almost surely, 2^{1386821522989} is an apocalyptic number.

It is an amenable number.

1386821522989 is a deficient number, since it is larger than the sum of its proper divisors (237136743539).

1386821522989 is a wasteful number, since it uses less digits than its factorization.

1386821522989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87865 (or 87858 counting only the distinct ones).

The product of its digits is 29859840, while the sum is 64.

The spelling of 1386821522989 in words is "one trillion, three hundred eighty-six billion, eight hundred twenty-one million, five hundred twenty-two thousand, nine hundred eighty-nine".