171392373239481 has 9 divisors (see below), whose sum is σ = 247566818076591. Its totient is φ = 114261555976272.

The previous prime is 171392373239431. The next prime is 171392373239543. The reversal of 171392373239481 is 184932373293171.

The square root of 171392373239481 is 13091691.

It is a perfect power (a square), and thus also a powerful number.

171392373239481 is a `hidden beast` number, since 1 + 7 + 1 + 3 + 9 + 237 + 3 + 2 + 394 + 8 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8804780271225 + 162587592968256 = 2967285^2 + 12750984^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 171392373239481 - 2²¹ = 171392371142329 is a prime.

It is a super-2 number, since 2×171392373239481² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (171392373239431) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 37093125 + ... + 41457021.

Almost surely, 2^{171392373239481} is an apocalyptic number.

171392373239481 is the 13091691-st square number.

171392373239481 is the 6545846-th centered octagonal number.

It is an amenable number.

171392373239481 is a deficient number, since it is larger than the sum of its proper divisors (76174444837110).

171392373239481 is an frugal number, since it uses more digits than its factorization.

171392373239481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8727800 (or 4363900 counting only the distinct ones).

The product of its digits is 41150592, while the sum is 63.

The spelling of 171392373239481 in words is "one hundred seventy-one trillion, three hundred ninety-two billion, three hundred seventy-three million, two hundred thirty-nine thousand, four hundred eighty-one".