65235995264 has 128 divisors (see below), whose sum is σ = 146878824960. Its totient is φ = 28592640000.

The previous prime is 65235995261. The next prime is 65235995281. The reversal of 65235995264 is 46259953256.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (65235995261) 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, 12786314 + ... + 12791414.

It is an arithmetic number, because the mean of its divisors is an integer number (1147490820).

Almost surely, 2^65235995264 is an apocalyptic number.

65235995264 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65235995264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73439412480).

65235995264 is an abundant number, since it is smaller than the sum of its proper divisors (81642829696).

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

65235995264 is a wasteful number, since it uses less digits than its factorization.

65235995264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5450 (or 5438 counting only the distinct ones).

The product of its digits is 17496000, while the sum is 56.

The spelling of 65235995264 in words is "sixty-five billion, two hundred thirty-five million, nine hundred ninety-five thousand, two hundred sixty-four".