171884774942 has 16 divisors (see below), whose sum is σ = 258177756672. Its totient is φ = 85825564440.

The previous prime is 171884774927. The next prime is 171884774947. The reversal of 171884774942 is 249477488171.

It is a super-2 number, since 2×171884774942² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171884774947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16169033 + ... + 16179659.

It is an arithmetic number, because the mean of its divisors is an integer number (16136109792).

Almost surely, 2^171884774942 is an apocalyptic number.

171884774942 is a deficient number, since it is larger than the sum of its proper divisors (86292981730).

171884774942 is a wasteful number, since it uses less digits than its factorization.

171884774942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20863.

The product of its digits is 25288704, while the sum is 62.

The spelling of 171884774942 in words is "one hundred seventy-one billion, eight hundred eighty-four million, seven hundred seventy-four thousand, nine hundred forty-two".