171940775194057 has 4 divisors (see below), whose sum is σ = 175599089559936. Its totient is φ = 168282460828180.

The previous prime is 171940775194049. The next prime is 171940775194061. The reversal of 171940775194057 is 750491577049171.

171940775194057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 171940775194057 - 2³ = 171940775194049 is a prime.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 171940775193983 and 171940775194001.

It is not an unprimeable number, because it can be changed into a prime (171940775134057) 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, 1829157182869 + ... + 1829157182962.

It is an arithmetic number, because the mean of its divisors is an integer number (43899772389984).

Almost surely, 2^{171940775194057} is an apocalyptic number.

It is an amenable number.

171940775194057 is a deficient number, since it is larger than the sum of its proper divisors (3658314365879).

171940775194057 is an equidigital number, since it uses as much as digits as its factorization.

171940775194057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3658314365878.

The product of its (nonzero) digits is 77792400, while the sum is 67.

The spelling of 171940775194057 in words is "one hundred seventy-one trillion, nine hundred forty billion, seven hundred seventy-five million, one hundred ninety-four thousand, fifty-seven".