161605611054986 has 64 divisors (see below), whose sum is σ = 279934302219264. Its totient is φ = 68536982563200.

The previous prime is 161605611054929. The next prime is 161605611055033. The reversal of 161605611054986 is 689450116506161.

It is a super-2 number, since 2×161605611054986² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5598267725 + ... + 5598296591.

It is an arithmetic number, because the mean of its divisors is an integer number (4373973472176).

Almost surely, 2^{161605611054986} is an apocalyptic number.

161605611054986 is a deficient number, since it is larger than the sum of its proper divisors (118328691164278).

161605611054986 is a wasteful number, since it uses less digits than its factorization.

161605611054986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32955.

The product of its (nonzero) digits is 9331200, while the sum is 59.

The spelling of 161605611054986 in words is "one hundred sixty-one trillion, six hundred five billion, six hundred eleven million, fifty-four thousand, nine hundred eighty-six".