27663209940321 has 8 divisors (see below), whose sum is σ = 40982533244960. Its totient is φ = 18442139960196.

The previous prime is 27663209940319. The next prime is 27663209940323. The reversal of 27663209940321 is 12304990236672.

27663209940321 is a `hidden beast` number, since 2 + 7 + 6 + 6 + 3 + 209 + 9 + 403 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (27663209940319) and next prime (27663209940323).

It is not a de Polignac number, because 27663209940321 - 2¹ = 27663209940319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27663209940323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 512281665535 + ... + 512281665588.

It is an arithmetic number, because the mean of its divisors is an integer number (5122816655620).

Almost surely, 2^{27663209940321} is an apocalyptic number.

It is an amenable number.

27663209940321 is a deficient number, since it is larger than the sum of its proper divisors (13319323304639).

27663209940321 is a wasteful number, since it uses less digits than its factorization.

27663209940321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024563331132 (or 1024563331126 counting only the distinct ones).

The product of its (nonzero) digits is 5878656, while the sum is 54.

The spelling of 27663209940321 in words is "twenty-seven trillion, six hundred sixty-three billion, two hundred nine million, nine hundred forty thousand, three hundred twenty-one".