11857774289 has 4 divisors (see below), whose sum is σ = 11944327524. Its totient is φ = 11771221056.

The previous prime is 11857774283. The next prime is 11857774297. The reversal of 11857774289 is 98247775811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98247775811 = 19 ⋅5170935569.

It can be written as a sum of positive squares in 2 ways, for example, as 5593843264 + 6263931025 = 74792^2 + 79145^2 .

It is a cyclic number.

It is not a de Polignac number, because 11857774289 - 2⁴ = 11857774273 is a prime.

It is a super-2 number, since 2×11857774289² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11857774283) 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, 43276412 + ... + 43276685.

It is an arithmetic number, because the mean of its divisors is an integer number (2986081881).

Almost surely, 2^11857774289 is an apocalyptic number.

It is an amenable number.

11857774289 is a deficient number, since it is larger than the sum of its proper divisors (86553235).

11857774289 is an equidigital number, since it uses as much as digits as its factorization.

11857774289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86553234.

The product of its digits is 7902720, while the sum is 59.

The spelling of 11857774289 in words is "eleven billion, eight hundred fifty-seven million, seven hundred seventy-four thousand, two hundred eighty-nine".