27534656161 has 2 divisors, whose sum is σ = 27534656162. Its totient is φ = 27534656160.

The previous prime is 27534656143. The next prime is 27534656213. The reversal of 27534656161 is 16165643572.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24379699600 + 3154956561 = 156140^2 + 56169^2 .

It is a cyclic number.

It is not a de Polignac number, because 27534656161 - 2¹¹ = 27534654113 is a prime.

It is not a weakly prime, because it can be changed into another prime (27534686161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13767328080 + 13767328081.

It is an arithmetic number, because the mean of its divisors is an integer number (13767328081).

Almost surely, 2^27534656161 is an apocalyptic number.

It is an amenable number.

27534656161 is a deficient number, since it is larger than the sum of its proper divisors (1).

27534656161 is an equidigital number, since it uses as much as digits as its factorization.

27534656161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 907200, while the sum is 46.

The spelling of 27534656161 in words is "twenty-seven billion, five hundred thirty-four million, six hundred fifty-six thousand, one hundred sixty-one".