65221582560 has 192 divisors, whose sum is σ = 217708948800. Its totient is φ = 16356114432.

The previous prime is 65221582487. The next prime is 65221582571. The reversal of 65221582560 is 6528512256.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13616646 + ... + 13621434.

It is an arithmetic number, because the mean of its divisors is an integer number (1133900775).

Almost surely, 2^65221582560 is an apocalyptic number.

65221582560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65221582560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108854474400).

65221582560 is an abundant number, since it is smaller than the sum of its proper divisors (152487366240).

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

65221582560 is a wasteful number, since it uses less digits than its factorization.

65221582560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6493 (or 6485 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 42.

The spelling of 65221582560 in words is "sixty-five billion, two hundred twenty-one million, five hundred eighty-two thousand, five hundred sixty".