11721132826 has 16 divisors (see below), whose sum is σ = 19587040200. Its totient is φ = 5223210048.

The previous prime is 11721132823. The next prime is 11721132901. The reversal of 11721132826 is 62823112711.

It can be written as a sum of positive squares in 4 ways, for example, as 7378981801 + 4342151025 = 85901^2 + 65895^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11721132791 and 11721132800.

It is not an unprimeable number, because it can be changed into a prime (11721132823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7771881 + ... + 7773388.

Almost surely, 2^11721132826 is an apocalyptic number.

11721132826 is a deficient number, since it is larger than the sum of its proper divisors (7865907374).

11721132826 is a wasteful number, since it uses less digits than its factorization.

11721132826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15545313.

The product of its digits is 8064, while the sum is 34.

The spelling of 11721132826 in words is "eleven billion, seven hundred twenty-one million, one hundred thirty-two thousand, eight hundred twenty-six".