172727382258 has 30 divisors (see below), whose sum is σ = 387049135869. Its totient is φ = 57574030824.

The previous prime is 172727382253. The next prime is 172727382259. The reversal of 172727382258 is 852283727271.

It is a happy number.

172727382258 is a `hidden beast` number, since 1 + 7 + 2 + 7 + 2 + 7 + 382 + 258 = 666.

172727382258 is digitally balanced in base 2, 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 170748289089 + 1979093169 = 413217^2 + 44487^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=293877.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (172727382253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 5273460 + ... + 5306112.

Almost surely, 2^172727382258 is an apocalyptic number.

172727382258 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

172727382258 is an abundant number, since it is smaller than the sum of its proper divisors (214321753611).

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

172727382258 is an frugal number, since it uses more digits than its factorization.

172727382258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65320 (or 32658 counting only the distinct ones).

The product of its digits is 5268480, while the sum is 54.

The spelling of 172727382258 in words is "one hundred seventy-two billion, seven hundred twenty-seven million, three hundred eighty-two thousand, two hundred fifty-eight".