12971766736 has 20 divisors (see below), whose sum is σ = 25140446464. Its totient is φ = 6483909600.

The previous prime is 12971766679. The next prime is 12971766737. The reversal of 12971766736 is 63766717921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12971766737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68400 + ... + 174991.

Almost surely, 2^12971766736 is an apocalyptic number.

12971766736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12971766736 is a deficient number, since it is larger than the sum of its proper divisors (12168679728).

12971766736 is a wasteful number, since it uses less digits than its factorization.

12971766736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246730 (or 246724 counting only the distinct ones).

The product of its digits is 4000752, while the sum is 55.

The spelling of 12971766736 in words is "twelve billion, nine hundred seventy-one million, seven hundred sixty-six thousand, seven hundred thirty-six".