11956729586897 has 2 divisors, whose sum is σ = 11956729586898. Its totient is φ = 11956729586896.

The previous prime is 11956729586833. The next prime is 11956729586939. The reversal of 11956729586897 is 79868592765911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8207514495376 + 3749215091521 = 2864876^2 + 1936289^2 .

It is a cyclic number.

It is not a de Polignac number, because 11956729586897 - 2⁶ = 11956729586833 is a prime.

It is not a weakly prime, because it can be changed into another prime (11956729586297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5978364793448 + 5978364793449.

It is an arithmetic number, because the mean of its divisors is an integer number (5978364793449).

Almost surely, 2^{11956729586897} is an apocalyptic number.

It is an amenable number.

11956729586897 is a deficient number, since it is larger than the sum of its proper divisors (1).

11956729586897 is an equidigital number, since it uses as much as digits as its factorization.

11956729586897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4115059200, while the sum is 83.

The spelling of 11956729586897 in words is "eleven trillion, nine hundred fifty-six billion, seven hundred twenty-nine million, five hundred eighty-six thousand, eight hundred ninety-seven".