12884337981 has 56 divisors (see below), whose sum is σ = 19915859040. Its totient is φ = 8326626336.

The previous prime is 12884337967. The next prime is 12884337989. The reversal of 12884337981 is 18973348821.

It is a happy number.

12884337981 is a `hidden beast` number, since 128 + 8 + 433 + 7 + 9 + 81 = 666.

It is not a de Polignac number, because 12884337981 - 2¹⁰ = 12884336957 is a prime.

It is a super-2 number, since 2×12884337981² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12884337989) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 4355755 + ... + 4358711.

It is an arithmetic number, because the mean of its divisors is an integer number (355640340).

Almost surely, 2^12884337981 is an apocalyptic number.

It is an amenable number.

12884337981 is a deficient number, since it is larger than the sum of its proper divisors (7031521059).

12884337981 is an equidigital number, since it uses as much as digits as its factorization.

12884337981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3157 (or 3142 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The spelling of 12884337981 in words is "twelve billion, eight hundred eighty-four million, three hundred thirty-seven thousand, nine hundred eighty-one".