171553890442 has 16 divisors (see below), whose sum is σ = 281098376064. Its totient is φ = 77875200000.

The previous prime is 171553890401. The next prime is 171553890461. The reversal of 171553890442 is 244098355171.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5175159 + ... + 5208202.

It is an arithmetic number, because the mean of its divisors is an integer number (17568648504).

Almost surely, 2^171553890442 is an apocalyptic number.

171553890442 is a deficient number, since it is larger than the sum of its proper divisors (109544485622).

171553890442 is a wasteful number, since it uses less digits than its factorization.

171553890442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10384125.

The product of its (nonzero) digits is 1209600, while the sum is 49.

The spelling of 171553890442 in words is "one hundred seventy-one billion, five hundred fifty-three million, eight hundred ninety thousand, four hundred forty-two".