1986915318456 has 32 divisors (see below), whose sum is σ = 4967369231760. Its totient is φ = 662294314752.

The previous prime is 1986915318359. The next prime is 1986915318463. The reversal of 1986915318456 is 6548135196891.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 904636 + ... + 2189108.

Almost surely, 2^{1986915318456} is an apocalyptic number.

It is an amenable number.

1986915318456 is an abundant number, since it is smaller than the sum of its proper divisors (2980453913304).

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

1986915318456 is a wasteful number, since it uses less digits than its factorization.

1986915318456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1348935 (or 1348931 counting only the distinct ones).

The product of its digits is 55987200, while the sum is 66.

The spelling of 1986915318456 in words is "one trillion, nine hundred eighty-six billion, nine hundred fifteen million, three hundred eighteen thousand, four hundred fifty-six".