12717787501 has 2 divisors, whose sum is σ = 12717787502. Its totient is φ = 12717787500.

The previous prime is 12717787487. The next prime is 12717787529. The reversal of 12717787501 is 10578771721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10317277476 + 2400510025 = 101574^2 + 48995^2 .

It is a cyclic number.

It is not a de Polignac number, because 12717787501 - 2¹¹ = 12717785453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12717787531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6358893750 + 6358893751.

It is an arithmetic number, because the mean of its divisors is an integer number (6358893751).

Almost surely, 2^12717787501 is an apocalyptic number.

It is an amenable number.

12717787501 is a deficient number, since it is larger than the sum of its proper divisors (1).

12717787501 is an equidigital number, since it uses as much as digits as its factorization.

12717787501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192080, while the sum is 46.

The spelling of 12717787501 in words is "twelve billion, seven hundred seventeen million, seven hundred eighty-seven thousand, five hundred one".