11728051687399 has 4 divisors (see below), whose sum is σ = 11728136455560. Its totient is φ = 11727966919240.

The previous prime is 11728051687381. The next prime is 11728051687463. The reversal of 11728051687399 is 99378615082711.

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

It is a cyclic number.

It is not a de Polignac number, because 11728051687399 - 2⁷ = 11728051687271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11728051687199) 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, 42176209 + ... + 42453370.

It is an arithmetic number, because the mean of its divisors is an integer number (2932034113890).

Almost surely, 2^{11728051687399} is an apocalyptic number.

11728051687399 is a deficient number, since it is larger than the sum of its proper divisors (84768161).

11728051687399 is an equidigital number, since it uses as much as digits as its factorization.

11728051687399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84768160.

The product of its (nonzero) digits is 45722880, while the sum is 67.

The spelling of 11728051687399 in words is "eleven trillion, seven hundred twenty-eight billion, fifty-one million, six hundred eighty-seven thousand, three hundred ninety-nine".