65221506452 has 12 divisors (see below), whose sum is σ = 114167301696. Its totient is φ = 32602277400.

The previous prime is 65221506439. The next prime is 65221506523. The reversal of 65221506452 is 25460512256.

It is a happy number.

65221506452 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2101628 + ... + 2132435.

It is an arithmetic number, because the mean of its divisors is an integer number (9513941808).

Almost surely, 2^65221506452 is an apocalyptic number.

It is an amenable number.

65221506452 is a deficient number, since it is larger than the sum of its proper divisors (48945795244).

65221506452 is a wasteful number, since it uses less digits than its factorization.

65221506452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4237918 (or 4237916 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 38.

The spelling of 65221506452 in words is "sixty-five billion, two hundred twenty-one million, five hundred six thousand, four hundred fifty-two".