12127747664 has 20 divisors (see below), whose sum is σ = 23501486880. Its totient is φ = 6062847840.

The previous prime is 12127747663. The next prime is 12127747699. The reversal of 12127747664 is 46674772121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12127747663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38357 + ... + 160395.

It is an arithmetic number, because the mean of its divisors is an integer number (1175074344).

Almost surely, 2^12127747664 is an apocalyptic number.

It is an amenable number.

12127747664 is a deficient number, since it is larger than the sum of its proper divisors (11373739216).

12127747664 is a wasteful number, since it uses less digits than its factorization.

12127747664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128258 (or 128252 counting only the distinct ones).

The product of its digits is 790272, while the sum is 47.

The spelling of 12127747664 in words is "twelve billion, one hundred twenty-seven million, seven hundred forty-seven thousand, six hundred sixty-four".