172140727166 has 16 divisors (see below), whose sum is σ = 269446500000. Its totient is φ = 82325472768.

The previous prime is 172140727151. The next prime is 172140727177. The reversal of 172140727166 is 661727041271.

It is a congruent 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, 2554190 + ... + 2620718.

It is an arithmetic number, because the mean of its divisors is an integer number (16840406250).

Almost surely, 2^172140727166 is an apocalyptic number.

172140727166 is a deficient number, since it is larger than the sum of its proper divisors (97305772834).

172140727166 is a wasteful number, since it uses less digits than its factorization.

172140727166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122803.

The product of its (nonzero) digits is 197568, while the sum is 44.

The spelling of 172140727166 in words is "one hundred seventy-two billion, one hundred forty million, seven hundred twenty-seven thousand, one hundred sixty-six".