12154364442 has 80 divisors (see below), whose sum is σ = 30005277984. Its totient is φ = 3646620000.

The previous prime is 12154364423. The next prime is 12154364449. The reversal of 12154364442 is 24446345121.

12154364442 is a `hidden beast` number, since 1 + 2 + 1 + 5 + 4 + 3 + 644 + 4 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 12154364397 and 12154364406.

It is not an unprimeable number, because it can be changed into a prime (12154364449) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 146217 + ... + 213747.

Almost surely, 2^12154364442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12154364442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15002638992).

12154364442 is an abundant number, since it is smaller than the sum of its proper divisors (17850913542).

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

12154364442 is a wasteful number, since it uses less digits than its factorization.

12154364442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67657 (or 67648 counting only the distinct ones).

The product of its digits is 92160, while the sum is 36.

The spelling of 12154364442 in words is "twelve billion, one hundred fifty-four million, three hundred sixty-four thousand, four hundred forty-two".