402564332171 has 2 divisors, whose sum is σ = 402564332172. Its totient is φ = 402564332170.

The previous prime is 402564332147. The next prime is 402564332197. The reversal of 402564332171 is 171233465204.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402564332171 is a prime.

It is not a weakly prime, because it can be changed into another prime (402564331171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201282166085 + 201282166086.

It is an arithmetic number, because the mean of its divisors is an integer number (201282166086).

Almost surely, 2^402564332171 is an apocalyptic number.

402564332171 is a deficient number, since it is larger than the sum of its proper divisors (1).

402564332171 is an equidigital number, since it uses as much as digits as its factorization.

402564332171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 38.

Adding to 402564332171 its reverse (171233465204), we get a palindrome (573797797375).

The spelling of 402564332171 in words is "four hundred two billion, five hundred sixty-four million, three hundred thirty-two thousand, one hundred seventy-one".