12391153664 has 144 divisors (see below), whose sum is σ = 26952494688. Its totient is φ = 5674893312.

The previous prime is 12391153657. The next prime is 12391153667. The reversal of 12391153664 is 46635119321.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12391153667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149290967 + ... + 149291049.

It is an arithmetic number, because the mean of its divisors is an integer number (187170102).

Almost surely, 2^12391153664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12391153664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13476247344).

12391153664 is an abundant number, since it is smaller than the sum of its proper divisors (14561341024).

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

12391153664 is an frugal number, since it uses more digits than its factorization.

12391153664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201 (or 169 counting only the distinct ones).

The product of its digits is 116640, while the sum is 41.

The spelling of 12391153664 in words is "twelve billion, three hundred ninety-one million, one hundred fifty-three thousand, six hundred sixty-four".