11728894450679 has 16 divisors (see below), whose sum is σ = 14482599912000. Its totient is φ = 9461965266432.

The previous prime is 11728894450649. The next prime is 11728894450681. The reversal of 11728894450679 is 97605449882711.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-11728894450679 is a prime.

It is a super-2 number, since 2×11728894450679² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11728894450619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1005730274 + ... + 1005741935.

It is an arithmetic number, because the mean of its divisors is an integer number (905162494500).

Almost surely, 2^{11728894450679} is an apocalyptic number.

11728894450679 is a deficient number, since it is larger than the sum of its proper divisors (2753705461321).

11728894450679 is an equidigital number, since it uses as much as digits as its factorization.

11728894450679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2011472247 (or 2011472233 counting only the distinct ones).

The product of its (nonzero) digits is 243855360, while the sum is 71.

The spelling of 11728894450679 in words is "eleven trillion, seven hundred twenty-eight billion, eight hundred ninety-four million, four hundred fifty thousand, six hundred seventy-nine".