11728643519 has 8 divisors (see below), whose sum is σ = 12419609760. Its totient is φ = 11037793536.

The previous prime is 11728643503. The next prime is 11728643599. The reversal of 11728643519 is 91534682711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11728643519 - 2⁴ = 11728643503 is a prime.

It is a super-2 number, since 2×11728643519² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11728643599) 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, 262022 + ... + 303500.

It is an arithmetic number, because the mean of its divisors is an integer number (1552451220).

Almost surely, 2^11728643519 is an apocalyptic number.

11728643519 is a deficient number, since it is larger than the sum of its proper divisors (690966241).

11728643519 is a wasteful number, since it uses less digits than its factorization.

11728643519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58129.

The product of its digits is 362880, while the sum is 47.

The spelling of 11728643519 in words is "eleven billion, seven hundred twenty-eight million, six hundred forty-three thousand, five hundred nineteen".