161435530657 has 2 divisors, whose sum is σ = 161435530658. Its totient is φ = 161435530656.

The previous prime is 161435530651. The next prime is 161435530661. The reversal of 161435530657 is 756035534161.

161435530657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151376243041 + 10059287616 = 389071^2 + 100296^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161435530657 is a prime.

It is a super-2 number, since 2×161435530657² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161435530651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80717765328 + 80717765329.

It is an arithmetic number, because the mean of its divisors is an integer number (80717765329).

Almost surely, 2^161435530657 is an apocalyptic number.

It is an amenable number.

161435530657 is a deficient number, since it is larger than the sum of its proper divisors (1).

161435530657 is an equidigital number, since it uses as much as digits as its factorization.

161435530657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1134000, while the sum is 46.

The spelling of 161435530657 in words is "one hundred sixty-one billion, four hundred thirty-five million, five hundred thirty thousand, six hundred fifty-seven".