11989264665912 has 128 divisors (see below), whose sum is σ = 30550044672000. Its totient is φ = 3919887129600.

The previous prime is 11989264665881. The next prime is 11989264665919. The reversal of 11989264665912 is 21956646298911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11989264665919) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 821681737 + ... + 821696327.

It is an arithmetic number, because the mean of its divisors is an integer number (238672224000).

Almost surely, 2^{11989264665912} is an apocalyptic number.

11989264665912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11989264665912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15275022336000).

11989264665912 is an abundant number, since it is smaller than the sum of its proper divisors (18560780006088).

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

11989264665912 is a wasteful number, since it uses less digits than its factorization.

11989264665912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16197 (or 16193 counting only the distinct ones).

The product of its digits is 100776960, while the sum is 69.

The spelling of 11989264665912 in words is "eleven trillion, nine hundred eighty-nine billion, two hundred sixty-four million, six hundred sixty-five thousand, nine hundred twelve".