11827312345 has 4 divisors (see below), whose sum is σ = 14192774820. Its totient is φ = 9461849872.

The previous prime is 11827312319. The next prime is 11827312351. The reversal of 11827312345 is 54321372811.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5796081424 + 6031230921 = 76132^2 + 77661^2 .

It is a cyclic number.

It is not a de Polignac number, because 11827312345 - 2¹⁵ = 11827279577 is a prime.

It is an unprimeable number.

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, 1182731230 + ... + 1182731239.

It is an arithmetic number, because the mean of its divisors is an integer number (3548193705).

Almost surely, 2^11827312345 is an apocalyptic number.

It is an amenable number.

11827312345 is a deficient number, since it is larger than the sum of its proper divisors (2365462475).

11827312345 is an equidigital number, since it uses as much as digits as its factorization.

11827312345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2365462474.

The product of its digits is 40320, while the sum is 37.

The spelling of 11827312345 in words is "eleven billion, eight hundred twenty-seven million, three hundred twelve thousand, three hundred forty-five".