65511264 has 96 divisors (see below), whose sum is σ = 211680000. Its totient is φ = 17275392.

The previous prime is 65511247. The next prime is 65511293. The reversal of 65511264 is 46211556.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4987 + ... + 12485.

It is an arithmetic number, because the mean of its divisors is an integer number (2205000).

Almost surely, 2^65511264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65511264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105840000).

65511264 is an abundant number, since it is smaller than the sum of its proper divisors (146168736).

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

65511264 is a wasteful number, since it uses less digits than its factorization.

65511264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7532 (or 7524 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

The square root of 65511264 is about 8093.9028904478. The cubic root of 65511264 is about 403.1240046367.

The spelling of 65511264 in words is "sixty-five million, five hundred eleven thousand, two hundred sixty-four".