171213981675 has 48 divisors (see below), whose sum is σ = 309244373760. Its totient is φ = 82895472000.

The previous prime is 171213981661. The next prime is 171213981691. The reversal of 171213981675 is 576189312171.

It is not a de Polignac number, because 171213981675 - 2⁹ = 171213981163 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 438570 + ... + 731280.

It is an arithmetic number, because the mean of its divisors is an integer number (6442591120).

Almost surely, 2^171213981675 is an apocalyptic number.

171213981675 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

171213981675 is a deficient number, since it is larger than the sum of its proper divisors (138030392085).

171213981675 is a wasteful number, since it uses less digits than its factorization.

171213981675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293444 (or 293439 counting only the distinct ones).

The product of its digits is 635040, while the sum is 51.

The spelling of 171213981675 in words is "one hundred seventy-one billion, two hundred thirteen million, nine hundred eighty-one thousand, six hundred seventy-five".