161606061616157 has 2 divisors, whose sum is σ = 161606061616158. Its totient is φ = 161606061616156.

The previous prime is 161606061616033. The next prime is 161606061616163. The reversal of 161606061616157 is 751616160606161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105008817359161 + 56597244256996 = 10247381^2 + 7523114^2 .

It is a cyclic number.

It is not a de Polignac number, because 161606061616157 - 2⁴⁶ = 91237317438493 is a prime.

It is a super-2 number, since 2×161606061616157² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161606061616099 and 161606061616108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161606061616187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80803030808078 + 80803030808079.

It is an arithmetic number, because the mean of its divisors is an integer number (80803030808079).

Almost surely, 2^{161606061616157} is an apocalyptic number.

It is an amenable number.

161606061616157 is a deficient number, since it is larger than the sum of its proper divisors (1).

161606061616157 is an equidigital number, since it uses as much as digits as its factorization.

161606061616157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1632960, while the sum is 53.

The spelling of 161606061616157 in words is "one hundred sixty-one trillion, six hundred six billion, sixty-one million, six hundred sixteen thousand, one hundred fifty-seven".