27141787447517 has 2 divisors, whose sum is σ = 27141787447518. Its totient is φ = 27141787447516.

The previous prime is 27141787447399. The next prime is 27141787447547. The reversal of 27141787447517 is 71574478714172.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19149892371481 + 7991895076036 = 4376059^2 + 2826994^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27141787447517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27141787447547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13570893723758 + 13570893723759.

It is an arithmetic number, because the mean of its divisors is an integer number (13570893723759).

Almost surely, 2^{27141787447517} is an apocalyptic number.

It is an amenable number.

27141787447517 is a deficient number, since it is larger than the sum of its proper divisors (1).

27141787447517 is an equidigital number, since it uses as much as digits as its factorization.

27141787447517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86051840, while the sum is 65.

The spelling of 27141787447517 in words is "twenty-seven trillion, one hundred forty-one billion, seven hundred eighty-seven million, four hundred forty-seven thousand, five hundred seventeen".