171038448651 has 16 divisors (see below), whose sum is σ = 260758534400. Its totient is φ = 97688062368.

The previous prime is 171038448643. The next prime is 171038448653. The reversal of 171038448651 is 156844830171.

It is not a de Polignac number, because 171038448651 - 2³ = 171038448643 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 171038448651.

It is not an unprimeable number, because it can be changed into a prime (171038448653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1964461 + ... + 2049678.

It is an arithmetic number, because the mean of its divisors is an integer number (16297408400).

Almost surely, 2^171038448651 is an apocalyptic number.

171038448651 is a deficient number, since it is larger than the sum of its proper divisors (89720085749).

171038448651 is a wasteful number, since it uses less digits than its factorization.

171038448651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4016178.

The product of its (nonzero) digits is 645120, while the sum is 48.

The spelling of 171038448651 in words is "one hundred seventy-one billion, thirty-eight million, four hundred forty-eight thousand, six hundred fifty-one".