1989015786376 has 32 divisors (see below), whose sum is σ = 3769810732800. Its totient is φ = 983788041600.

The previous prime is 1989015786361. The next prime is 1989015786389. The reversal of 1989015786376 is 6736875109891.

It is a happy number.

It is a Smith number, since the sum of its digits (70) coincides with the sum of the digits of its prime factors.

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 7 ways as a sum of consecutive naturals, for example, 3155925 + ... + 3733348.

It is an arithmetic number, because the mean of its divisors is an integer number (117806585400).

Almost surely, 2^{1989015786376} is an apocalyptic number.

It is an amenable number.

1989015786376 is a deficient number, since it is larger than the sum of its proper divisors (1780794946424).

1989015786376 is a wasteful number, since it uses less digits than its factorization.

1989015786376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6889669 (or 6889665 counting only the distinct ones).

The product of its (nonzero) digits is 137168640, while the sum is 70.

The spelling of 1989015786376 in words is "one trillion, nine hundred eighty-nine billion, fifteen million, seven hundred eighty-six thousand, three hundred seventy-six".