172080646 has 4 divisors (see below), whose sum is σ = 258120972. Its totient is φ = 86040322.

The previous prime is 172080593. The next prime is 172080653. The reversal of 172080646 is 646080271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 646080271 = 241 ⋅2680831.

It is a super-2 number, since 2×172080646² = 59223497455554632, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43020160 + ... + 43020163.

It is an arithmetic number, because the mean of its divisors is an integer number (64530243).

Almost surely, 2^172080646 is an apocalyptic number.

172080646 is a deficient number, since it is larger than the sum of its proper divisors (86040326).

172080646 is an equidigital number, since it uses as much as digits as its factorization.

172080646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86040325.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 172080646 is about 13117.9512882157. The cubic root of 172080646 is about 556.2166809820.

The spelling of 172080646 in words is "one hundred seventy-two million, eighty thousand, six hundred forty-six".