161873724458 has 16 divisors (see below), whose sum is σ = 243608478720. Its totient is φ = 80671335696.

The previous prime is 161873724427. The next prime is 161873724511. The reversal of 161873724458 is 854427378161.

It is a Curzon number.

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, 635423 + ... + 852941.

It is an arithmetic number, because the mean of its divisors is an integer number (15225529920).

Almost surely, 2^161873724458 is an apocalyptic number.

161873724458 is a deficient number, since it is larger than the sum of its proper divisors (81734754262).

161873724458 is a wasteful number, since it uses less digits than its factorization.

161873724458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218741.

The product of its digits is 9031680, while the sum is 56.

The spelling of 161873724458 in words is "one hundred sixty-one billion, eight hundred seventy-three million, seven hundred twenty-four thousand, four hundred fifty-eight".