161605616067 has 24 divisors (see below), whose sum is σ = 268814008320. Its totient is φ = 91641129840.

The previous prime is 161605615999. The next prime is 161605616131. The reversal of 161605616067 is 760616506161.

161605616067 is a `hidden beast` number, since 16 + 16 + 0 + 5 + 616 + 0 + 6 + 7 = 666.

It is not a de Polignac number, because 161605616067 - 2¹⁵ = 161605583299 is a prime.

It is a super-2 number, since 2×161605616067² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161605616167) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9782467 + ... + 9798972.

It is an arithmetic number, because the mean of its divisors is an integer number (11200583680).

Almost surely, 2^161605616067 is an apocalyptic number.

161605616067 is a deficient number, since it is larger than the sum of its proper divisors (107208392253).

161605616067 is a wasteful number, since it uses less digits than its factorization.

161605616067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19581583 (or 19581580 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 161605616067 in words is "one hundred sixty-one billion, six hundred five million, six hundred sixteen thousand, sixty-seven".