172896871681 has 8 divisors (see below), whose sum is σ = 175543126784. Its totient is φ = 170258124960.

The previous prime is 172896871673. The next prime is 172896871691. The reversal of 172896871681 is 186178698271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 172896871681 - 2³ = 172896871673 is a prime.

It is a super-4 number, since 4×172896871681⁴ (a number of 46 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172896871691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1830681 + ... + 1922806.

It is an arithmetic number, because the mean of its divisors is an integer number (21942890848).

Almost surely, 2^172896871681 is an apocalyptic number.

It is an amenable number.

172896871681 is a deficient number, since it is larger than the sum of its proper divisors (2646255103).

172896871681 is an equidigital number, since it uses as much as digits as its factorization.

172896871681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3754191.

The product of its digits is 16257024, while the sum is 64.

The spelling of 172896871681 in words is "one hundred seventy-two billion, eight hundred ninety-six million, eight hundred seventy-one thousand, six hundred eighty-one".