161605611054987 has 16 divisors (see below), whose sum is σ = 237486033869952. Its totient is φ = 96933075045120.

The previous prime is 161605611054929. The next prime is 161605611055033. The reversal of 161605611054987 is 789450116506161.

It is not a de Polignac number, because 161605611054987 - 2³¹ = 161603463571339 is a prime.

It is a super-2 number, since 2×161605611054987² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161605611054987.

It is not an unprimeable number, because it can be changed into a prime (161605611054487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25242985093 + ... + 25242991494.

It is an arithmetic number, because the mean of its divisors is an integer number (14842877116872).

Almost surely, 2^{161605611054987} is an apocalyptic number.

161605611054987 is a deficient number, since it is larger than the sum of its proper divisors (75880422814965).

161605611054987 is a wasteful number, since it uses less digits than its factorization.

161605611054987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50485976698.

The product of its (nonzero) digits is 10886400, while the sum is 60.

The spelling of 161605611054987 in words is "one hundred sixty-one trillion, six hundred five billion, six hundred eleven million, fifty-four thousand, nine hundred eighty-seven".