161606155016516 has 12 divisors (see below), whose sum is σ = 323212310033088. Its totient is φ = 69259780721352.

The previous prime is 161606155016503. The next prime is 161606155016543. The reversal of 161606155016516 is 615610551606161.

161606155016516 is an admirable number.

It is a super-2 number, since 2×161606155016516² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2885824196696 + ... + 2885824196751.

It is an arithmetic number, because the mean of its divisors is an integer number (26934359169424).

Almost surely, 2^{161606155016516} is an apocalyptic number.

It is an amenable number.

161606155016516 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161606155016516 is a wasteful number, since it uses less digits than its factorization.

161606155016516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5771648393458 (or 5771648393456 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 50.

The spelling of 161606155016516 in words is "one hundred sixty-one trillion, six hundred six billion, one hundred fifty-five million, sixteen thousand, five hundred sixteen".