12663403564 has 24 divisors (see below), whose sum is σ = 26816620320. Its totient is φ = 5107927296.

The previous prime is 12663403531. The next prime is 12663403567. The reversal of 12663403564 is 46530436621.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12663403567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13301419 + ... + 13302370.

It is an arithmetic number, because the mean of its divisors is an integer number (1117359180).

Almost surely, 2^12663403564 is an apocalyptic number.

12663403564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12663403564 is an abundant number, since it is smaller than the sum of its proper divisors (14153216756).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12663403564 is a wasteful number, since it uses less digits than its factorization.

12663403564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26603817 (or 26603815 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 40.

The spelling of 12663403564 in words is "twelve billion, six hundred sixty-three million, four hundred three thousand, five hundred sixty-four".