65216611601 has 4 divisors (see below), whose sum is σ = 65826112752. Its totient is φ = 64607110452.

The previous prime is 65216611571. The next prime is 65216611609. The reversal of 65216611601 is 10611661256.

65216611601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 65216611601 - 2¹⁴ = 65216595217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65216611609) 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, 304750415 + ... + 304750628.

It is an arithmetic number, because the mean of its divisors is an integer number (16456528188).

Almost surely, 2^65216611601 is an apocalyptic number.

It is an amenable number.

65216611601 is a deficient number, since it is larger than the sum of its proper divisors (609501151).

65216611601 is a wasteful number, since it uses less digits than its factorization.

65216611601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609501150.

The product of its (nonzero) digits is 12960, while the sum is 35.

The spelling of 65216611601 in words is "sixty-five billion, two hundred sixteen million, six hundred eleven thousand, six hundred one".