27138312170803 has 4 divisors (see below), whose sum is σ = 27138324380688. Its totient is φ = 27138299960920.

The previous prime is 27138312170789. The next prime is 27138312170819. The reversal of 27138312170803 is 30807121383172.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27138312170803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27138312170903) 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, 1722151 + ... + 7565872.

It is an arithmetic number, because the mean of its divisors is an integer number (6784581095172).

Almost surely, 2^{27138312170803} is an apocalyptic number.

27138312170803 is a deficient number, since it is larger than the sum of its proper divisors (12209885).

27138312170803 is an equidigital number, since it uses as much as digits as its factorization.

27138312170803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12209884.

The product of its (nonzero) digits is 338688, while the sum is 46.

The spelling of 27138312170803 in words is "twenty-seven trillion, one hundred thirty-eight billion, three hundred twelve million, one hundred seventy thousand, eight hundred three".