1391986385894 has 64 divisors (see below), whose sum is σ = 2287554635520. Its totient is φ = 631440351360.

The previous prime is 1391986385857. The next prime is 1391986385903. The reversal of 1391986385894 is 4985836891931.

It is a congruent number.

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, 209727944 + ... + 209734580.

It is an arithmetic number, because the mean of its divisors is an integer number (35743041180).

Almost surely, 2^{1391986385894} is an apocalyptic number.

1391986385894 is a deficient number, since it is larger than the sum of its proper divisors (895568249626).

1391986385894 is a wasteful number, since it uses less digits than its factorization.

1391986385894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7365.

The product of its digits is 403107840, while the sum is 74.

The spelling of 1391986385894 in words is "one trillion, three hundred ninety-one billion, nine hundred eighty-six million, three hundred eighty-five thousand, eight hundred ninety-four".