12888581840 has 20 divisors (see below), whose sum is σ = 29965952964. Its totient is φ = 5155432704.

The previous prime is 12888581833. The next prime is 12888581843. The reversal of 12888581840 is 4818588821.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6998326336 + 5890255504 = 83656^2 + 76748^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×12888581840² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12888581843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80553557 + ... + 80553716.

Almost surely, 2^12888581840 is an apocalyptic number.

12888581840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12888581840 is an abundant number, since it is smaller than the sum of its proper divisors (17077371124).

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

12888581840 is a wasteful number, since it uses less digits than its factorization.

12888581840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161107286 (or 161107280 counting only the distinct ones).

The product of its (nonzero) digits is 1310720, while the sum is 53.

The spelling of 12888581840 in words is "twelve billion, eight hundred eighty-eight million, five hundred eighty-one thousand, eight hundred forty".