65643627522 has 64 divisors (see below), whose sum is σ = 147637499904. Its totient is φ = 19286725440.

The previous prime is 65643627521. The next prime is 65643627529. The reversal of 65643627522 is 22572634656.

It is not an unprimeable number, because it can be changed into a prime (65643627521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 233028 + ... + 430800.

It is an arithmetic number, because the mean of its divisors is an integer number (2306835936).

Almost surely, 2^65643627522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65643627522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73818749952).

65643627522 is an abundant number, since it is smaller than the sum of its proper divisors (81993872382).

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

65643627522 is a wasteful number, since it uses less digits than its factorization.

65643627522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197943.

The product of its digits is 3628800, while the sum is 48.

The spelling of 65643627522 in words is "sixty-five billion, six hundred forty-three million, six hundred twenty-seven thousand, five hundred twenty-two".