65167215181 has 2 divisors, whose sum is σ = 65167215182. Its totient is φ = 65167215180.

The previous prime is 65167215173. The next prime is 65167215187. The reversal of 65167215181 is 18151276156.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64823706025 + 343509156 = 254605^2 + 18534^2 .

It is a cyclic number.

It is not a de Polignac number, because 65167215181 - 2³ = 65167215173 is a prime.

It is a super-2 number, since 2×65167215181² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65167215187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32583607590 + 32583607591.

It is an arithmetic number, because the mean of its divisors is an integer number (32583607591).

Almost surely, 2^65167215181 is an apocalyptic number.

It is an amenable number.

65167215181 is a deficient number, since it is larger than the sum of its proper divisors (1).

65167215181 is an equidigital number, since it uses as much as digits as its factorization.

65167215181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100800, while the sum is 43.

The spelling of 65167215181 in words is "sixty-five billion, one hundred sixty-seven million, two hundred fifteen thousand, one hundred eighty-one".