11830861305 has 12 divisors (see below), whose sum is σ = 20506826340. Its totient is φ = 6309792672.

The previous prime is 11830861277. The next prime is 11830861319. The reversal of 11830861305 is 50316803811.

11830861305 is a `hidden beast` number, since 1 + 1 + 8 + 30 + 8 + 613 + 0 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 9083424249 + 2747437056 = 95307^2 + 52416^2 .

It is a de Polignac number, because none of the positive numbers 2^k-11830861305 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11830861305.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 131453970 + ... + 131454059.

It is an arithmetic number, because the mean of its divisors is an integer number (1708902195).

Almost surely, 2^11830861305 is an apocalyptic number.

11830861305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11830861305 is a deficient number, since it is larger than the sum of its proper divisors (8675965035).

11830861305 is a wasteful number, since it uses less digits than its factorization.

11830861305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262908040 (or 262908037 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The spelling of 11830861305 in words is "eleven billion, eight hundred thirty million, eight hundred sixty-one thousand, three hundred five".