65641417647 has 16 divisors (see below), whose sum is σ = 94409656320. Its totient is φ = 40328155872.

The previous prime is 65641417619. The next prime is 65641417649. The reversal of 65641417647 is 74671414656.

65641417647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 65641417647 - 2¹⁴ = 65641401263 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65641417647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65641417649) 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, 1362747 + ... + 1410092.

It is an arithmetic number, because the mean of its divisors is an integer number (5900603520).

Almost surely, 2^65641417647 is an apocalyptic number.

65641417647 is a deficient number, since it is larger than the sum of its proper divisors (28768238673).

65641417647 is a wasteful number, since it uses less digits than its factorization.

65641417647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2773462.

The product of its digits is 3386880, while the sum is 51.

The spelling of 65641417647 in words is "sixty-five billion, six hundred forty-one million, four hundred seventeen thousand, six hundred forty-seven".