1189989664436 has 12 divisors (see below), whose sum is σ = 2082515517600. Its totient is φ = 594985230840.

The previous prime is 1189989664417. The next prime is 1189989664477. The reversal of 1189989664436 is 6344669899811.

It is a hoax number, since the sum of its digits (74) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2117786 + ... + 2620113.

It is an arithmetic number, because the mean of its divisors is an integer number (173542959800).

Almost surely, 2^{1189989664436} is an apocalyptic number.

It is an amenable number.

1189989664436 is a deficient number, since it is larger than the sum of its proper divisors (892525853164).

1189989664436 is a wasteful number, since it uses less digits than its factorization.

1189989664436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4800694 (or 4800692 counting only the distinct ones).

The product of its digits is 483729408, while the sum is 74.

The spelling of 1189989664436 in words is "one trillion, one hundred eighty-nine billion, nine hundred eighty-nine million, six hundred sixty-four thousand, four hundred thirty-six".