11727522865 has 4 divisors (see below), whose sum is σ = 14073027444. Its totient is φ = 9382018288.

The previous prime is 11727522841. The next prime is 11727522869. The reversal of 11727522865 is 56822572711.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1388903824 + 10338619041 = 37268^2 + 101679^2 .

It is a cyclic number.

It is not a de Polignac number, because 11727522865 - 2⁹ = 11727522353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11727522869) 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, 1172752282 + ... + 1172752291.

It is an arithmetic number, because the mean of its divisors is an integer number (3518256861).

Almost surely, 2^11727522865 is an apocalyptic number.

It is an amenable number.

11727522865 is a deficient number, since it is larger than the sum of its proper divisors (2345504579).

11727522865 is an equidigital number, since it uses as much as digits as its factorization.

11727522865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2345504578.

The product of its digits is 470400, while the sum is 46.

The spelling of 11727522865 in words is "eleven billion, seven hundred twenty-seven million, five hundred twenty-two thousand, eight hundred sixty-five".