11857784315 has 16 divisors (see below), whose sum is σ = 15339834048. Its totient is φ = 8747415936.

The previous prime is 11857784311. The next prime is 11857784317. The reversal of 11857784315 is 51348775811.

It is a cyclic number.

It is not a de Polignac number, because 11857784315 - 2² = 11857784311 is a prime.

It is a super-2 number, since 2×11857784315² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11857784311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31472 + ... + 157181.

It is an arithmetic number, because the mean of its divisors is an integer number (958739628).

Almost surely, 2^11857784315 is an apocalyptic number.

11857784315 is a deficient number, since it is larger than the sum of its proper divisors (3482049733).

11857784315 is a wasteful number, since it uses less digits than its factorization.

11857784315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189638.

The product of its digits is 940800, while the sum is 50.

The spelling of 11857784315 in words is "eleven billion, eight hundred fifty-seven million, seven hundred eighty-four thousand, three hundred fifteen".