11321785519 has 4 divisors (see below), whose sum is σ = 12351038760. Its totient is φ = 10292532280.

The previous prime is 11321785451. The next prime is 11321785523. The reversal of 11321785519 is 91558712311.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11321785519 is a prime.

It is a super-2 number, since 2×11321785519² (a number of 21 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 (11321785019) 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 3 ways as a sum of consecutive naturals, for example, 514626604 + ... + 514626625.

It is an arithmetic number, because the mean of its divisors is an integer number (3087759690).

Almost surely, 2^11321785519 is an apocalyptic number.

11321785519 is a deficient number, since it is larger than the sum of its proper divisors (1029253241).

11321785519 is a wasteful number, since it uses less digits than its factorization.

11321785519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1029253240.

The product of its digits is 75600, while the sum is 43.

The spelling of 11321785519 in words is "eleven billion, three hundred twenty-one million, seven hundred eighty-five thousand, five hundred nineteen".