65640224611 has 16 divisors (see below), whose sum is σ = 74980763424. Its totient is φ = 56925402624.

The previous prime is 65640224591. The next prime is 65640224623. The reversal of 65640224611 is 11642204656.

It is a cyclic number.

It is not a de Polignac number, because 65640224611 - 2²⁷ = 65506006883 is a prime.

It is a super-3 number, since 3×65640224611³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65640224651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139356 + ... + 388201.

It is an arithmetic number, because the mean of its divisors is an integer number (4686297714).

Almost surely, 2^65640224611 is an apocalyptic number.

65640224611 is a deficient number, since it is larger than the sum of its proper divisors (9340538813).

65640224611 is a wasteful number, since it uses less digits than its factorization.

65640224611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528150.

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 65640224611 in words is "sixty-five billion, six hundred forty million, two hundred twenty-four thousand, six hundred eleven".