12027855805057 has 4 divisors (see below), whose sum is σ = 12036654530496. Its totient is φ = 12019057079620.

The previous prime is 12027855804989. The next prime is 12027855805061. The reversal of 12027855805057 is 75050855872021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12027855805057 - 2¹¹ = 12027855803009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12027855804989 and 12027855805007.

It is not an unprimeable number, because it can be changed into a prime (12027855803057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4399360669 + ... + 4399363402.

It is an arithmetic number, because the mean of its divisors is an integer number (3009163632624).

Almost surely, 2^{12027855805057} is an apocalyptic number.

It is an amenable number.

12027855805057 is a deficient number, since it is larger than the sum of its proper divisors (8798725439).

12027855805057 is an equidigital number, since it uses as much as digits as its factorization.

12027855805057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8798725438.

The product of its (nonzero) digits is 7840000, while the sum is 55.

The spelling of 12027855805057 in words is "twelve trillion, twenty-seven billion, eight hundred fifty-five million, eight hundred five thousand, fifty-seven".