161606116505051 has 8 divisors (see below), whose sum is σ = 166819491268608. Its totient is φ = 156392758881000.

The previous prime is 161606116505039. The next prime is 161606116505087. The reversal of 161606116505051 is 150505611606161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161606116505051 is a prime.

It is a super-2 number, since 2×161606116505051² (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 = 161606116504993 and 161606116505011.

It is not an unprimeable number, because it can be changed into a prime (161606116565051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16473356 + ... + 24384086.

It is an arithmetic number, because the mean of its divisors is an integer number (20852436408576).

Almost surely, 2^{161606116505051} is an apocalyptic number.

161606116505051 is a deficient number, since it is larger than the sum of its proper divisors (5213374763557).

161606116505051 is an equidigital number, since it uses as much as digits as its factorization.

161606116505051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8569753.

The product of its (nonzero) digits is 162000, while the sum is 44.

The spelling of 161606116505051 in words is "one hundred sixty-one trillion, six hundred six billion, one hundred sixteen million, five hundred five thousand, fifty-one".