171828394038889 has 15 divisors (see below), whose sum is σ = 200455281472407. Its totient is φ = 147280930054776.

The previous prime is 171828394038871. The next prime is 171828394038907. The reversal of 171828394038889 is 988830493828171.

The square root of 171828394038889 is 13108333.

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

171828394038889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (171828394038871) and next prime (171828394038907).

It can be written as a sum of positive squares in only one way, i.e., 11874399105625 + 159953994933264 = 3445925^2 + 12647292^2 .

It is not a de Polignac number, because 171828394038889 - 2²³ = 171828385650281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171828394038989) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 642174559 + ... + 642442075.

Almost surely, 2^{171828394038889} is an apocalyptic number.

171828394038889 is the 13108333-rd square number.

171828394038889 is the 6554167-th centered octagonal number.

It is an amenable number.

171828394038889 is a deficient number, since it is larger than the sum of its proper divisors (28626887433518).

171828394038889 is an frugal number, since it uses more digits than its factorization.

171828394038889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535062 (or 267524 counting only the distinct ones).

The product of its (nonzero) digits is 1337720832, while the sum is 79.

The spelling of 171828394038889 in words is "one hundred seventy-one trillion, eight hundred twenty-eight billion, three hundred ninety-four million, thirty-eight thousand, eight hundred eighty-nine".