65649332736 has 160 divisors (see below), whose sum is σ = 209275355520. Its totient is φ = 20199739392.

The previous prime is 65649332713. The next prime is 65649332737. The reversal of 65649332736 is 63723394656.

It is a happy number.

65649332736 is a `hidden beast` number, since 6 + 56 + 493 + 32 + 73 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (65649332737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2940 + ... + 362363.

It is an arithmetic number, because the mean of its divisors is an integer number (1307970972).

Almost surely, 2^65649332736 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 65649332736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104637677760).

65649332736 is an abundant number, since it is smaller than the sum of its proper divisors (143626022784).

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

65649332736 is a wasteful number, since it uses less digits than its factorization.

65649332736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365343 (or 365321 counting only the distinct ones).

The product of its digits is 14696640, while the sum is 54.

The spelling of 65649332736 in words is "sixty-five billion, six hundred forty-nine million, three hundred thirty-two thousand, seven hundred thirty-six".