171255500072 has 8 divisors (see below), whose sum is σ = 321104062650. Its totient is φ = 85627750032.

The previous prime is 171255500063. The next prime is 171255500077. The reversal of 171255500072 is 270005552171.

171255500072 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 161824371076 + 9431128996 = 402274^2 + 97114^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (171255500077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10703468747 + ... + 10703468762.

Almost surely, 2^171255500072 is an apocalyptic number.

It is an amenable number.

171255500072 is a deficient number, since it is larger than the sum of its proper divisors (149848562578).

171255500072 is a wasteful number, since it uses less digits than its factorization.

171255500072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21406937515 (or 21406937511 counting only the distinct ones).

The product of its (nonzero) digits is 24500, while the sum is 35.

The spelling of 171255500072 in words is "one hundred seventy-one billion, two hundred fifty-five million, five hundred thousand, seventy-two".