12719669761 has 2 divisors, whose sum is σ = 12719669762. Its totient is φ = 12719669760.

The previous prime is 12719669749. The next prime is 12719669777. The reversal of 12719669761 is 16796691721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12716847361 + 2822400 = 112769^2 + 1680^2 .

It is a cyclic number.

It is not a de Polignac number, because 12719669761 - 2²³ = 12711281153 is a prime.

It is not a weakly prime, because it can be changed into another prime (12719669701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6359834880 + 6359834881.

It is an arithmetic number, because the mean of its divisors is an integer number (6359834881).

Almost surely, 2^12719669761 is an apocalyptic number.

It is an amenable number.

12719669761 is a deficient number, since it is larger than the sum of its proper divisors (1).

12719669761 is an equidigital number, since it uses as much as digits as its factorization.

12719669761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1714608, while the sum is 55.

The spelling of 12719669761 in words is "twelve billion, seven hundred nineteen million, six hundred sixty-nine thousand, seven hundred sixty-one".