161606061616057 has 4 divisors (see below), whose sum is σ = 165364342118800. Its totient is φ = 157847781113316.

The previous prime is 161606061616033. The next prime is 161606061616157. The reversal of 161606061616057 is 750616160606161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161606061616057 is a prime.

It is a super-2 number, since 2×161606061616057² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161606061615995 and 161606061616013.

It is not an unprimeable number, because it can be changed into a prime (161606061616157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1879140251307 + ... + 1879140251392.

It is an arithmetic number, because the mean of its divisors is an integer number (41341085529700).

Almost surely, 2^{161606061616057} is an apocalyptic number.

It is an amenable number.

161606061616057 is a deficient number, since it is larger than the sum of its proper divisors (3758280502743).

161606061616057 is an equidigital number, since it uses as much as digits as its factorization.

161606061616057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3758280502742.

The product of its (nonzero) digits is 1632960, while the sum is 52.

The spelling of 161606061616057 in words is "one hundred sixty-one trillion, six hundred six billion, sixty-one million, six hundred sixteen thousand, fifty-seven".