161605611054988 has 24 divisors (see below), whose sum is σ = 283273586637440. Its totient is φ = 80670302835840.

The previous prime is 161605611054929. The next prime is 161605611055033. The reversal of 161605611054988 is 889450116506161.

It is a super-2 number, since 2×161605611054988² (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 7 ways as a sum of consecutive naturals, for example, 409460848 + ... + 409855336.

Almost surely, 2^{161605611054988} is an apocalyptic number.

It is an amenable number.

161605611054988 is a deficient number, since it is larger than the sum of its proper divisors (121667975582452).

161605611054988 is a wasteful number, since it uses less digits than its factorization.

161605611054988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562177 (or 562175 counting only the distinct ones).

The product of its (nonzero) digits is 12441600, while the sum is 61.

The spelling of 161605611054988 in words is "one hundred sixty-one trillion, six hundred five billion, six hundred eleven million, fifty-four thousand, nine hundred eighty-eight".