11728864251 has 12 divisors (see below), whose sum is σ = 18244900128. Its totient is φ = 7217762544.

The previous prime is 11728864223. The next prime is 11728864253. The reversal of 11728864251 is 15246882711.

11728864251 is a `hidden beast` number, since 117 + 288 + 6 + 4 + 251 = 666.

It is not a de Polignac number, because 11728864251 - 2⁶ = 11728864187 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11728864197 and 11728864206.

It is not an unprimeable number, because it can be changed into a prime (11728864253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50123235 + ... + 50123468.

It is an arithmetic number, because the mean of its divisors is an integer number (1520408344).

Almost surely, 2^11728864251 is an apocalyptic number.

11728864251 is a deficient number, since it is larger than the sum of its proper divisors (6516035877).

11728864251 is a wasteful number, since it uses less digits than its factorization.

11728864251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100246722 (or 100246719 counting only the distinct ones).

The product of its digits is 215040, while the sum is 45.

The spelling of 11728864251 in words is "eleven billion, seven hundred twenty-eight million, eight hundred sixty-four thousand, two hundred fifty-one".