162540556171 has 4 divisors (see below), whose sum is σ = 185760635632. Its totient is φ = 139320476712.

The previous prime is 162540556163. The next prime is 162540556177. The reversal of 162540556171 is 171655045261.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 162540556171 - 2³ = 162540556163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (162540556177) 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, 11610039720 + ... + 11610039733.

It is an arithmetic number, because the mean of its divisors is an integer number (46440158908).

Almost surely, 2^162540556171 is an apocalyptic number.

162540556171 is a deficient number, since it is larger than the sum of its proper divisors (23220079461).

162540556171 is an equidigital number, since it uses as much as digits as its factorization.

162540556171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23220079460.

The product of its (nonzero) digits is 252000, while the sum is 43.

The spelling of 162540556171 in words is "one hundred sixty-two billion, five hundred forty million, five hundred fifty-six thousand, one hundred seventy-one".