171024840851 has 4 divisors (see below), whose sum is σ = 171316195512. Its totient is φ = 170733486192.

The previous prime is 171024840841. The next prime is 171024840859. The reversal of 171024840851 is 158048420171.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 158048420171 = 1447 ⋅109224893.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-171024840851 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 171024840799 and 171024840808.

It is not an unprimeable number, because it can be changed into a prime (171024840859) 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, 145676450 + ... + 145677623.

It is an arithmetic number, because the mean of its divisors is an integer number (42829048878).

Almost surely, 2^171024840851 is an apocalyptic number.

171024840851 is a deficient number, since it is larger than the sum of its proper divisors (291354661).

171024840851 is an equidigital number, since it uses as much as digits as its factorization.

171024840851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291354660.

The product of its (nonzero) digits is 71680, while the sum is 41.

The spelling of 171024840851 in words is "one hundred seventy-one billion, twenty-four million, eight hundred forty thousand, eight hundred fifty-one".