11795697721 has 2 divisors, whose sum is σ = 11795697722. Its totient is φ = 11795697720.

The previous prime is 11795697647. The next prime is 11795697731. The reversal of 11795697721 is 12779659711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6210228025 + 5585469696 = 78805^2 + 74736^2 .

It is a cyclic number.

It is not a de Polignac number, because 11795697721 - 2²¹ = 11793600569 is a prime.

It is not a weakly prime, because it can be changed into another prime (11795697731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5897848860 + 5897848861.

It is an arithmetic number, because the mean of its divisors is an integer number (5897848861).

Almost surely, 2^11795697721 is an apocalyptic number.

It is an amenable number.

11795697721 is a deficient number, since it is larger than the sum of its proper divisors (1).

11795697721 is an equidigital number, since it uses as much as digits as its factorization.

11795697721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1666980, while the sum is 55.

The spelling of 11795697721 in words is "eleven billion, seven hundred ninety-five million, six hundred ninety-seven thousand, seven hundred twenty-one".