172742131706 has 8 divisors (see below), whose sum is σ = 259309350804. Its totient is φ = 86305681440.

The previous prime is 172742131697. The next prime is 172742131729. The reversal of 172742131706 is 607131247271.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 119156826481 + 53585305225 = 345191^2 + 231485^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32688905 + ... + 32694188.

Almost surely, 2^172742131706 is an apocalyptic number.

172742131706 is a deficient number, since it is larger than the sum of its proper divisors (86567219098).

172742131706 is a wasteful number, since it uses less digits than its factorization.

172742131706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65384416.

The product of its (nonzero) digits is 98784, while the sum is 41.

Adding to 172742131706 its reverse (607131247271), we get a palindrome (779873378977).

The spelling of 172742131706 in words is "one hundred seventy-two billion, seven hundred forty-two million, one hundred thirty-one thousand, seven hundred six".