11856822534 has 12 divisors (see below), whose sum is σ = 25689782196. Its totient is φ = 3952274172.

The previous prime is 11856822517. The next prime is 11856822539. The reversal of 11856822534 is 43522865811.

11856822534 is a `hidden beast` number, since 1 + 18 + 568 + 22 + 53 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 11856822534.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11856822539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 329356164 + ... + 329356199.

It is an arithmetic number, because the mean of its divisors is an integer number (2140815183).

Almost surely, 2^11856822534 is an apocalyptic number.

11856822534 is an abundant number, since it is smaller than the sum of its proper divisors (13832959662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11856822534 is a wasteful number, since it uses less digits than its factorization.

11856822534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658712371 (or 658712368 counting only the distinct ones).

The product of its digits is 460800, while the sum is 45.

The spelling of 11856822534 in words is "eleven billion, eight hundred fifty-six million, eight hundred twenty-two thousand, five hundred thirty-four".