1393421986664 has 128 divisors (see below), whose sum is σ = 2807488512000. Its totient is φ = 647250912000.

The previous prime is 1393421986657. The next prime is 1393421986679. The reversal of 1393421986664 is 4666891243931.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is a junction number, because it is equal to n+sod(n) for n = 1393421986597 and 1393421986606.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 164683394 + ... + 164691854.

It is an arithmetic number, because the mean of its divisors is an integer number (21933504000).

Almost surely, 2^{1393421986664} is an apocalyptic number.

It is an amenable number.

1393421986664 is an abundant number, since it is smaller than the sum of its proper divisors (1414066525336).

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

1393421986664 is a wasteful number, since it uses less digits than its factorization.

1393421986664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8815 (or 8811 counting only the distinct ones).

The product of its digits is 40310784, while the sum is 62.

The spelling of 1393421986664 in words is "one trillion, three hundred ninety-three billion, four hundred twenty-one million, nine hundred eighty-six thousand, six hundred sixty-four".