12446781459 has 48 divisors (see below), whose sum is σ = 20058571008. Its totient is φ = 6724223424.

The previous prime is 12446781437. The next prime is 12446781461. The reversal of 12446781459 is 95418764421.

It is not a de Polignac number, because 12446781459 - 2⁷ = 12446781331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12446781409) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4448649 + ... + 4451445.

It is an arithmetic number, because the mean of its divisors is an integer number (417886896).

Almost surely, 2^12446781459 is an apocalyptic number.

12446781459 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12446781459 is a deficient number, since it is larger than the sum of its proper divisors (7611789549).

12446781459 is a wasteful number, since it uses less digits than its factorization.

12446781459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3432 (or 3413 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 51.

The spelling of 12446781459 in words is "twelve billion, four hundred forty-six million, seven hundred eighty-one thousand, four hundred fifty-nine".