172168500385 has 12 divisors (see below), whose sum is σ = 240333172308. Its totient is φ = 118058400096.

The previous prime is 172168500373. The next prime is 172168500391. The reversal of 172168500385 is 583005861271.

It can be written as a sum of positive squares in 2 ways, for example, as 37467022096 + 134701478289 = 193564^2 + 367017^2 .

It is not a de Polignac number, because 172168500385 - 2⁵ = 172168500353 is a prime.

It is a super-3 number, since 3×172168500385³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 351364042 + ... + 351364531.

It is an arithmetic number, because the mean of its divisors is an integer number (20027764359).

Almost surely, 2^172168500385 is an apocalyptic number.

It is an amenable number.

172168500385 is a deficient number, since it is larger than the sum of its proper divisors (68164671923).

172168500385 is an equidigital number, since it uses as much as digits as its factorization.

172168500385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702728592 (or 702728585 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 46.

The spelling of 172168500385 in words is "one hundred seventy-two billion, one hundred sixty-eight million, five hundred thousand, three hundred eighty-five".