172664534 has 12 divisors (see below), whose sum is σ = 301282164. Its totient is φ = 73999044.

The previous prime is 172664483. The next prime is 172664537. The reversal of 172664534 is 435466271.

It is a happy number.

172664534 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172664537) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 880844 + ... + 881039.

It is an arithmetic number, because the mean of its divisors is an integer number (25106847).

Almost surely, 2^172664534 is an apocalyptic number.

172664534 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

172664534 is a deficient number, since it is larger than the sum of its proper divisors (128617630).

172664534 is a wasteful number, since it uses less digits than its factorization.

172664534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1761899 (or 1761892 counting only the distinct ones).

The product of its digits is 120960, while the sum is 38.

The square root of 172664534 is about 13140.1877459951. The cubic root of 172664534 is about 556.8450716414.

The spelling of 172664534 in words is "one hundred seventy-two million, six hundred sixty-four thousand, five hundred thirty-four".