12154405144 has 64 divisors (see below), whose sum is σ = 26494997760. Its totient is φ = 5119424640.

The previous prime is 12154405111. The next prime is 12154405181. The reversal of 12154405144 is 44150445121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1726159 + ... + 1733185.

It is an arithmetic number, because the mean of its divisors is an integer number (413984340).

Almost surely, 2^12154405144 is an apocalyptic number.

12154405144 is a gapful number since it is divisible by the number (14) 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 12154405144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13247498880).

12154405144 is an abundant number, since it is smaller than the sum of its proper divisors (14340592616).

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

12154405144 is a wasteful number, since it uses less digits than its factorization.

12154405144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7568 (or 7564 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 31.

The spelling of 12154405144 in words is "twelve billion, one hundred fifty-four million, four hundred five thousand, one hundred forty-four".