12873281440 has 24 divisors (see below), whose sum is σ = 30413127780. Its totient is φ = 5149312512.

The previous prime is 12873281437. The next prime is 12873281471. The reversal of 12873281440 is 4418237821.

It can be written as a sum of positive squares in 2 ways, for example, as 11563131024 + 1310150416 = 107532^2 + 36196^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 12873281393 and 12873281402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40228845 + ... + 40229164.

Almost surely, 2^12873281440 is an apocalyptic number.

12873281440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12873281440 is an abundant number, since it is smaller than the sum of its proper divisors (17539846340).

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

12873281440 is an equidigital number, since it uses as much as digits as its factorization.

12873281440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80458024 (or 80458016 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 40.

The spelling of 12873281440 in words is "twelve billion, eight hundred seventy-three million, two hundred eighty-one thousand, four hundred forty".