65121275233 has 24 divisors (see below), whose sum is σ = 80367503400. Its totient is φ = 52431257088.

The previous prime is 65121275227. The next prime is 65121275251. The reversal of 65121275233 is 33257212156.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9128464849 + 55992810384 = 95543^2 + 236628^2 .

It is not a de Polignac number, because 65121275233 - 2²⁹ = 64584404321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65121275192 and 65121275201.

It is not an unprimeable number, because it can be changed into a prime (65121275213) 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 23 ways as a sum of consecutive naturals, for example, 347203 + ... + 500791.

It is an arithmetic number, because the mean of its divisors is an integer number (3348645975).

Almost surely, 2^65121275233 is an apocalyptic number.

It is an amenable number.

65121275233 is a deficient number, since it is larger than the sum of its proper divisors (15246228167).

65121275233 is a wasteful number, since it uses less digits than its factorization.

65121275233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154129 (or 154122 counting only the distinct ones).

The product of its digits is 75600, while the sum is 37.

Adding to 65121275233 its reverse (33257212156), we get a palindrome (98378487389).

The spelling of 65121275233 in words is "sixty-five billion, one hundred twenty-one million, two hundred seventy-five thousand, two hundred thirty-three".