27061774517 has 2 divisors, whose sum is σ = 27061774518. Its totient is φ = 27061774516.

The previous prime is 27061774457. The next prime is 27061774541. The reversal of 27061774517 is 71547716072.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26526962641 + 534811876 = 162871^2 + 23126^2 .

It is a cyclic number.

It is not a de Polignac number, because 27061774517 - 2²⁰ = 27060725941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27061774417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13530887258 + 13530887259.

It is an arithmetic number, because the mean of its divisors is an integer number (13530887259).

Almost surely, 2^27061774517 is an apocalyptic number.

It is an amenable number.

27061774517 is a deficient number, since it is larger than the sum of its proper divisors (1).

27061774517 is an equidigital number, since it uses as much as digits as its factorization.

27061774517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576240, while the sum is 47.

The spelling of 27061774517 in words is "twenty-seven billion, sixty-one million, seven hundred seventy-four thousand, five hundred seventeen".