172234021698 has 54 divisors (see below), whose sum is σ = 390195836121. Its totient is φ = 54902283216.

The previous prime is 172234021681. The next prime is 172234021769. The reversal of 172234021698 is 896120432271.

172234021698 is a `hidden beast` number, since 1 + 7 + 2 + 2 + 340 + 216 + 98 = 666.

172234021698 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 138471061689 + 33762960009 = 372117^2 + 183747^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=293457.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 40494940 + ... + 40499192.

Almost surely, 2^172234021698 is an apocalyptic number.

172234021698 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 172234021698

172234021698 is an abundant number, since it is smaller than the sum of its proper divisors (217961814423).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172234021698 is an frugal number, since it uses more digits than its factorization.

172234021698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8560 (or 4281 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 172234021698 in words is "one hundred seventy-two billion, two hundred thirty-four million, twenty-one thousand, six hundred ninety-eight".