11857784311 has 2 divisors, whose sum is σ = 11857784312. Its totient is φ = 11857784310.

The previous prime is 11857784299. The next prime is 11857784317. The reversal of 11857784311 is 11348775811.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11857784311 - 2²¹ = 11855687159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11857784317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5928892155 + 5928892156.

It is an arithmetic number, because the mean of its divisors is an integer number (5928892156).

Almost surely, 2^11857784311 is an apocalyptic number.

11857784311 is a deficient number, since it is larger than the sum of its proper divisors (1).

11857784311 is an equidigital number, since it uses as much as digits as its factorization.

11857784311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 188160, while the sum is 46.

The spelling of 11857784311 in words is "eleven billion, eight hundred fifty-seven million, seven hundred eighty-four thousand, three hundred eleven".