171245894263 has 4 divisors (see below), whose sum is σ = 171270396448. Its totient is φ = 171221392080.

The previous prime is 171245894243. The next prime is 171245894269. The reversal of 171245894263 is 362498542171.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-171245894263 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 171245894263.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171245894269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12240606 + ... + 12254587.

It is an arithmetic number, because the mean of its divisors is an integer number (42817599112).

Almost surely, 2^171245894263 is an apocalyptic number.

171245894263 is a deficient number, since it is larger than the sum of its proper divisors (24502185).

171245894263 is an equidigital number, since it uses as much as digits as its factorization.

171245894263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24502184.

The product of its digits is 2903040, while the sum is 52.

The spelling of 171245894263 in words is "one hundred seventy-one billion, two hundred forty-five million, eight hundred ninety-four thousand, two hundred sixty-three".