161776057 has 2 divisors, whose sum is σ = 161776058. Its totient is φ = 161776056.

The previous prime is 161776031. The next prime is 161776061. The reversal of 161776057 is 750677161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104939536 + 56836521 = 10244^2 + 7539^2 .

It is a cyclic number.

It is not a de Polignac number, because 161776057 - 2²⁷ = 27558329 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (161776067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80888028 + 80888029.

It is an arithmetic number, because the mean of its divisors is an integer number (80888029).

Almost surely, 2^161776057 is an apocalyptic number.

It is an amenable number.

161776057 is a deficient number, since it is larger than the sum of its proper divisors (1).

161776057 is an equidigital number, since it uses as much as digits as its factorization.

161776057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61740, while the sum is 40.

The square root of 161776057 is about 12719.1217070991. The cubic root of 161776057 is about 544.8848697693.

The spelling of 161776057 in words is "one hundred sixty-one million, seven hundred seventy-six thousand, fifty-seven".