12183785857 has 2 divisors, whose sum is σ = 12183785858. Its totient is φ = 12183785856.

The previous prime is 12183785821. The next prime is 12183785923. The reversal of 12183785857 is 75858738121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11097358336 + 1086427521 = 105344^2 + 32961^2 .

It is a cyclic number.

It is not a de Polignac number, because 12183785857 - 2¹⁹ = 12183261569 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12183785798 and 12183785807.

It is not a weakly prime, because it can be changed into another prime (12183785357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6091892928 + 6091892929.

It is an arithmetic number, because the mean of its divisors is an integer number (6091892929).

Almost surely, 2^12183785857 is an apocalyptic number.

It is an amenable number.

12183785857 is a deficient number, since it is larger than the sum of its proper divisors (1).

12183785857 is an equidigital number, since it uses as much as digits as its factorization.

12183785857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3763200, while the sum is 55.

The spelling of 12183785857 in words is "twelve billion, one hundred eighty-three million, seven hundred eighty-five thousand, eight hundred fifty-seven".