12127919456 has 24 divisors (see below), whose sum is σ = 23916740400. Its totient is φ = 6053826688.

The previous prime is 12127919449. The next prime is 12127919467. The reversal of 12127919456 is 65491972121.

It is a self number, because there is not a number n which added to its sum of digits gives 12127919456.

It is a congruent number.

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, 297191 + ... + 335526.

It is an arithmetic number, because the mean of its divisors is an integer number (996530850).

Almost surely, 2^12127919456 is an apocalyptic number.

12127919456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12127919456 is a deficient number, since it is larger than the sum of its proper divisors (11788820944).

12127919456 is an equidigital number, since it uses as much as digits as its factorization.

12127919456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633326 (or 633318 counting only the distinct ones).

The product of its digits is 272160, while the sum is 47.

The spelling of 12127919456 in words is "twelve billion, one hundred twenty-seven million, nine hundred nineteen thousand, four hundred fifty-six".