27853944065987 has 4 divisors (see below), whose sum is σ = 29996555148000. Its totient is φ = 25711332983976.

The previous prime is 27853944065977. The next prime is 27853944066031. The reversal of 27853944065987 is 78956044935872.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27853944065987 - 2⁴ = 27853944065971 is a prime.

It is a super-2 number, since 2×27853944065987² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27853944065977) 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, 1071305540987 + ... + 1071305541012.

It is an arithmetic number, because the mean of its divisors is an integer number (7499138787000).

Almost surely, 2^{27853944065987} is an apocalyptic number.

27853944065987 is a deficient number, since it is larger than the sum of its proper divisors (2142611082013).

27853944065987 is a wasteful number, since it uses less digits than its factorization.

27853944065987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2142611082012.

The product of its (nonzero) digits is 3657830400, while the sum is 77.

The spelling of 27853944065987 in words is "twenty-seven trillion, eight hundred fifty-three billion, nine hundred forty-four million, sixty-five thousand, nine hundred eighty-seven".