170641681614121 has 3 divisors (see below), whose sum is σ = 170641694677111. Its totient is φ = 170641668551132.

The previous prime is 170641681614101. The next prime is 170641681614139. The reversal of 170641681614121 is 121416186146071.

It is a happy number.

The square root of 170641681614121 is 13062989.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 126055880506521 + 44585801107600 = 11227461^2 + 6677260^2 .

It is not a de Polignac number, because 170641681614121 - 2²⁷ = 170641547396393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (170641681614101) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 6531495 + ... + 19594483.

Almost surely, 2^{170641681614121} is an apocalyptic number.

170641681614121 is the 13062989-th square number.

170641681614121 is the 6531495-th centered octagonal number.

It is an amenable number.

170641681614121 is a deficient number, since it is larger than the sum of its proper divisors (13062990).

170641681614121 is an frugal number, since it uses more digits than its factorization.

170641681614121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26125978 (or 13062989 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 49.

The spelling of 170641681614121 in words is "one hundred seventy trillion, six hundred forty-one billion, six hundred eighty-one million, six hundred fourteen thousand, one hundred twenty-one".