12399145488 has 30 divisors (see below), whose sum is σ = 34700386734. Its totient is φ = 4133048448.

The previous prime is 12399145481. The next prime is 12399145501. The reversal of 12399145488 is 88454199321.

It is a happy number.

12399145488 is a `hidden beast` number, since 1 + 2 + 3 + 9 + 91 + 4 + 548 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12323664144 + 75481344 = 111012^2 + 8688^2 .

It is a super-4 number, since 4×12399145488⁴ (a number of 41 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (12399145481) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43052445 + ... + 43052732.

Almost surely, 2^12399145488 is an apocalyptic number.

12399145488 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12399145488 is an abundant number, since it is smaller than the sum of its proper divisors (22301241246).

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

12399145488 is a wasteful number, since it uses less digits than its factorization.

12399145488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86105191 (or 86105182 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 54.

The spelling of 12399145488 in words is "twelve billion, three hundred ninety-nine million, one hundred forty-five thousand, four hundred eighty-eight".