65216437664 has 24 divisors (see below), whose sum is σ = 146736985248. Its totient is φ = 27949901760.

The previous prime is 65216437607. The next prime is 65216437667. The reversal of 65216437664 is 46673461256.

It is not an unprimeable number, because it can be changed into a prime (65216437667) 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, 145572182 + ... + 145572629.

It is an arithmetic number, because the mean of its divisors is an integer number (6114041052).

Almost surely, 2^65216437664 is an apocalyptic number.

It is an amenable number.

65216437664 is an abundant number, since it is smaller than the sum of its proper divisors (81520547584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65216437664 is a wasteful number, since it uses less digits than its factorization.

65216437664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291144828 (or 291144820 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 50.

The spelling of 65216437664 in words is "sixty-five billion, two hundred sixteen million, four hundred thirty-seven thousand, six hundred sixty-four".