11857784312 has 32 divisors (see below), whose sum is σ = 24267859200. Its totient is φ = 5386946400.

The previous prime is 11857784311. The next prime is 11857784317. The reversal of 11857784312 is 21348775811.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11857784311) 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 7 ways as a sum of consecutive naturals, for example, 128639 + ... + 200657.

It is an arithmetic number, because the mean of its divisors is an integer number (758370600).

Almost surely, 2^11857784312 is an apocalyptic number.

It is an amenable number.

11857784312 is an abundant number, since it is smaller than the sum of its proper divisors (12410074888).

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

11857784312 is a wasteful number, since it uses less digits than its factorization.

11857784312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73907 (or 73903 counting only the distinct ones).

The product of its digits is 376320, while the sum is 47.

The spelling of 11857784312 in words is "eleven billion, eight hundred fifty-seven million, seven hundred eighty-four thousand, three hundred twelve".