171640347025 has 135 divisors (see below), whose sum is σ = 265024796721. Its totient is φ = 110248871040.

The previous prime is 171640347023. The next prime is 171640347031. The reversal of 171640347025 is 520743046171.

The square root of 171640347025 is 414295.

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

It can be written as a sum of positive squares in 4 ways, for example, as 35718354049 + 135921992976 = 188993^2 + 368676^2 .

It is not a de Polignac number, because 171640347025 - 2¹ = 171640347023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171640347023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 1928543181 + ... + 1928543269.

Almost surely, 2^171640347025 is an apocalyptic number.

171640347025 is the 414295-th square number.

171640347025 is the 207148-th centered octagonal number.

It is an amenable number.

171640347025 is a deficient number, since it is larger than the sum of its proper divisors (93384449696).

171640347025 is an frugal number, since it uses more digits than its factorization.

171640347025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 40.

The spelling of 171640347025 in words is "one hundred seventy-one billion, six hundred forty million, three hundred forty-seven thousand, twenty-five".