65297941181 has 4 divisors (see below), whose sum is σ = 71234117664. Its totient is φ = 59361764700.

The previous prime is 65297941157. The next prime is 65297941199. The reversal of 65297941181 is 18114979256.

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 a de Polignac number, because none of the positive numbers 2^k-65297941181 is a prime.

It is a super-2 number, since 2×65297941181² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65297941381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2968088225 + ... + 2968088246.

It is an arithmetic number, because the mean of its divisors is an integer number (17808529416).

Almost surely, 2^65297941181 is an apocalyptic number.

It is an amenable number.

65297941181 is a deficient number, since it is larger than the sum of its proper divisors (5936176483).

65297941181 is a wasteful number, since it uses less digits than its factorization.

65297941181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5936176482.

The product of its digits is 1088640, while the sum is 53.

The spelling of 65297941181 in words is "sixty-five billion, two hundred ninety-seven million, nine hundred forty-one thousand, one hundred eighty-one".