172055644 has 6 divisors (see below), whose sum is σ = 301097384. Its totient is φ = 86027820.

The previous prime is 172055641. The next prime is 172055669. The reversal of 172055644 is 446550271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172055641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21506952 + ... + 21506959.

Almost surely, 2^172055644 is an apocalyptic number.

It is an amenable number.

172055644 is a deficient number, since it is larger than the sum of its proper divisors (129041740).

172055644 is a wasteful number, since it uses less digits than its factorization.

172055644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43013915 (or 43013913 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 172055644 is about 13116.9982846686. The cubic root of 172055644 is about 556.1897416693.

The spelling of 172055644 in words is "one hundred seventy-two million, fifty-five thousand, six hundred forty-four".