172011164 has 24 divisors (see below), whose sum is σ = 331076928. Its totient is φ = 77699520.

The previous prime is 172011163. The next prime is 172011173. The reversal of 172011164 is 461110271.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172011163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32747 + ... + 37634.

It is an arithmetic number, because the mean of its divisors is an integer number (13794872).

Almost surely, 2^172011164 is an apocalyptic number.

It is an amenable number.

172011164 is a deficient number, since it is larger than the sum of its proper divisors (159065764).

172011164 is a wasteful number, since it uses less digits than its factorization.

172011164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70445 (or 70443 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 172011164 is about 13115.3026652075. The cubic root of 172011164 is about 556.1418086260.

The spelling of 172011164 in words is "one hundred seventy-two million, eleven thousand, one hundred sixty-four".