12717663645 has 16 divisors (see below), whose sum is σ = 20350068480. Its totient is φ = 6782151744.

The previous prime is 12717663641. The next prime is 12717663659. The reversal of 12717663645 is 54636671721.

It is a happy number.

It is not a de Polignac number, because 12717663645 - 2² = 12717663641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12717663594 and 12717663603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12717663641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176092 + ... + 237578.

It is an arithmetic number, because the mean of its divisors is an integer number (1271879280).

Almost surely, 2^12717663645 is an apocalyptic number.

12717663645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12717663645 is a deficient number, since it is larger than the sum of its proper divisors (7632404835).

12717663645 is a wasteful number, since it uses less digits than its factorization.

12717663645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75284.

The product of its digits is 1270080, while the sum is 48.

The spelling of 12717663645 in words is "twelve billion, seven hundred seventeen million, six hundred sixty-three thousand, six hundred forty-five".