12683881509 has 32 divisors (see below), whose sum is σ = 20299063680. Its totient is φ = 6959665152.

The previous prime is 12683881451. The next prime is 12683881517. The reversal of 12683881509 is 90518838621.

It is not a de Polignac number, because 12683881509 - 2⁷ = 12683881381 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12683881519) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 490852 + ... + 516045.

It is an arithmetic number, because the mean of its divisors is an integer number (634345740).

Almost surely, 2^12683881509 is an apocalyptic number.

12683881509 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

12683881509 is a deficient number, since it is larger than the sum of its proper divisors (7615182171).

12683881509 is a wasteful number, since it uses less digits than its factorization.

12683881509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006949.

The product of its (nonzero) digits is 829440, while the sum is 51.

The spelling of 12683881509 in words is "twelve billion, six hundred eighty-three million, eight hundred eighty-one thousand, five hundred nine".