65112270721 has 4 divisors (see below), whose sum is σ = 65123352000. Its totient is φ = 65101189444.

The previous prime is 65112270659. The next prime is 65112270733. The reversal of 65112270721 is 12707221156.

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 not a de Polignac number, because 65112270721 - 2¹⁷ = 65112139649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65112270791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5531821 + ... + 5543578.

It is an arithmetic number, because the mean of its divisors is an integer number (16280838000).

Almost surely, 2^65112270721 is an apocalyptic number.

It is an amenable number.

65112270721 is a deficient number, since it is larger than the sum of its proper divisors (11081279).

65112270721 is a wasteful number, since it uses less digits than its factorization.

65112270721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11081278.

The product of its (nonzero) digits is 11760, while the sum is 34.

Adding to 65112270721 its reverse (12707221156), we get a palindrome (77819491877).

The spelling of 65112270721 in words is "sixty-five billion, one hundred twelve million, two hundred seventy thousand, seven hundred twenty-one".