65319264 has 192 divisors, whose sum is σ = 210470400. Its totient is φ = 19616256.

The previous prime is 65319251. The next prime is 65319269. The reversal of 65319264 is 46291356.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65319269) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 377482 + ... + 377654.

It is an arithmetic number, because the mean of its divisors is an integer number (1096200).

Almost surely, 2^65319264 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 65319264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105235200).

65319264 is an abundant number, since it is smaller than the sum of its proper divisors (145151136).

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

65319264 is a wasteful number, since it uses less digits than its factorization.

65319264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234 (or 220 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 65319264 is about 8082.0334075033. The cubic root of 65319264 is about 402.7297948382.

The spelling of 65319264 in words is "sixty-five million, three hundred nineteen thousand, two hundred sixty-four".