12663901156 has 9 divisors (see below), whose sum is σ = 22162220899. Its totient is φ = 6331838044.

The previous prime is 12663901141. The next prime is 12663901169. The reversal of 12663901156 is 65110936621.

It is a happy number.

The square root of 12663901156 is 112534.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 196935 + ... + 253201.

Almost surely, 2^12663901156 is an apocalyptic number.

12663901156 is the 112534-th square number.

It is an amenable number.

12663901156 is a deficient number, since it is larger than the sum of its proper divisors (9498319743).

12663901156 is an frugal number, since it uses more digits than its factorization.

12663901156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112538 (or 56269 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 40.

The spelling of 12663901156 in words is "twelve billion, six hundred sixty-three million, nine hundred one thousand, one hundred fifty-six".