65645322636 has 96 divisors (see below), whose sum is σ = 156011885568. Its totient is φ = 21481286400.

The previous prime is 65645322599. The next prime is 65645322637. The reversal of 65645322636 is 63622354656.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (65645322637) 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, 61754241 + ... + 61755303.

It is an arithmetic number, because the mean of its divisors is an integer number (1625123808).

Almost surely, 2^65645322636 is an apocalyptic number.

It is an amenable number.

65645322636 is an abundant number, since it is smaller than the sum of its proper divisors (90366562932).

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

65645322636 is a wasteful number, since it uses less digits than its factorization.

65645322636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1591 (or 1589 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 48.

The spelling of 65645322636 in words is "sixty-five billion, six hundred forty-five million, three hundred twenty-two thousand, six hundred thirty-six".