65168078084 has 24 divisors (see below), whose sum is σ = 115112224920. Its totient is φ = 32278984704.

The previous prime is 65168078081. The next prime is 65168078147. The reversal of 65168078084 is 48087086156.

It can be written as a sum of positive squares in 4 ways, for example, as 18339118084 + 46828960000 = 135422^2 + 216400^2 .

It is a super-2 number, since 2×65168078084² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65168078081) 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 in 7 ways as a sum of consecutive naturals, for example, 3047012 + ... + 3068324.

It is an arithmetic number, because the mean of its divisors is an integer number (4796342705).

Almost surely, 2^65168078084 is an apocalyptic number.

It is an amenable number.

65168078084 is a deficient number, since it is larger than the sum of its proper divisors (49944146836).

65168078084 is a wasteful number, since it uses less digits than its factorization.

65168078084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28439 (or 28437 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 53.

The spelling of 65168078084 in words is "sixty-five billion, one hundred sixty-eight million, seventy-eight thousand, eighty-four".