171642326473 has 4 divisors (see below), whose sum is σ = 175634008528. Its totient is φ = 167650644420.

The previous prime is 171642326461. The next prime is 171642326501. The reversal of 171642326473 is 374623246171.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 171642326473 - 2⁵ = 171642326441 is a prime.

It is a super-2 number, since 2×171642326473² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171642326173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1995840963 + ... + 1995841048.

It is an arithmetic number, because the mean of its divisors is an integer number (43908502132).

Almost surely, 2^171642326473 is an apocalyptic number.

It is an amenable number.

171642326473 is a deficient number, since it is larger than the sum of its proper divisors (3991682055).

171642326473 is an equidigital number, since it uses as much as digits as its factorization.

171642326473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3991682054.

The product of its digits is 1016064, while the sum is 46.

The spelling of 171642326473 in words is "one hundred seventy-one billion, six hundred forty-two million, three hundred twenty-six thousand, four hundred seventy-three".