655016161 has 2 divisors, whose sum is σ = 655016162. Its totient is φ = 655016160.

The previous prime is 655016147. The next prime is 655016177. The reversal of 655016161 is 161610556.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 401601600 + 253414561 = 20040^2 + 15919^2 .

It is a cyclic number.

It is not a de Polignac number, because 655016161 - 2²⁷ = 520798433 is a prime.

It is not a weakly prime, because it can be changed into another prime (655016191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327508080 + 327508081.

It is an arithmetic number, because the mean of its divisors is an integer number (327508081).

Almost surely, 2^655016161 is an apocalyptic number.

It is an amenable number.

655016161 is a deficient number, since it is larger than the sum of its proper divisors (1).

655016161 is an equidigital number, since it uses as much as digits as its factorization.

655016161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 655016161 is about 25593.2835134533. The cubic root of 655016161 is about 868.4617027545.

The spelling of 655016161 in words is "six hundred fifty-five million, sixteen thousand, one hundred sixty-one".