12491265064 has 32 divisors (see below), whose sum is σ = 23916690720. Its totient is φ = 6114626496.

The previous prime is 12491265047. The next prime is 12491265067. The reversal of 12491265064 is 46056219421.

It is not an unprimeable number, because it can be changed into a prime (12491265067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15882 + ... + 158854.

It is an arithmetic number, because the mean of its divisors is an integer number (747396585).

Almost surely, 2^12491265064 is an apocalyptic number.

It is an amenable number.

12491265064 is a deficient number, since it is larger than the sum of its proper divisors (11425425656).

12491265064 is a wasteful number, since it uses less digits than its factorization.

12491265064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143209 (or 143205 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 12491265064 in words is "twelve billion, four hundred ninety-one million, two hundred sixty-five thousand, sixty-four".