161342193558 has 64 divisors (see below), whose sum is σ = 397239478272. Its totient is φ = 42542202240.

The previous prime is 161342193533. The next prime is 161342193587. The reversal of 161342193558 is 855391243161.

It is a Curzon number.

It is a congruent 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, 2580628 + ... + 2642408.

It is an arithmetic number, because the mean of its divisors is an integer number (6206866848).

Almost surely, 2^161342193558 is an apocalyptic number.

161342193558 is an abundant number, since it is smaller than the sum of its proper divisors (235897284714).

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

161342193558 is a wasteful number, since it uses less digits than its factorization.

161342193558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66589.

The product of its digits is 777600, while the sum is 48.

The spelling of 161342193558 in words is "one hundred sixty-one billion, three hundred forty-two million, one hundred ninety-three thousand, five hundred fifty-eight".