12154444464 has 20 divisors (see below), whose sum is σ = 31398981656. Its totient is φ = 4051481472.

The previous prime is 12154444453. The next prime is 12154444469. The reversal of 12154444464 is 46444445121.

It is not an unprimeable number, because it can be changed into a prime (12154444469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126608749 + ... + 126608844.

Almost surely, 2^12154444464 is an apocalyptic number.

It is an amenable number.

12154444464 is an abundant number, since it is smaller than the sum of its proper divisors (19244537192).

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

12154444464 is a wasteful number, since it uses less digits than its factorization.

12154444464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253217604 (or 253217598 counting only the distinct ones).

The product of its digits is 245760, while the sum is 39.

Adding to 12154444464 its reverse (46444445121), we get a palindrome (58598889585).

The spelling of 12154444464 in words is "twelve billion, one hundred fifty-four million, four hundred forty-four thousand, four hundred sixty-four".