65004428520 has 48 divisors (see below), whose sum is σ = 211264393860. Its totient is φ = 17334514176.

The previous prime is 65004428513. The next prime is 65004428527. The reversal of 65004428520 is 2582440056.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (65004428513) and next prime (65004428527).

It can be written as a sum of positive squares in 2 ways, for example, as 61574452164 + 3429976356 = 248142^2 + 58566^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (65004428527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90283569 + ... + 90284288.

Almost surely, 2^65004428520 is an apocalyptic number.

65004428520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65004428520 is an abundant number, since it is smaller than the sum of its proper divisors (146259965340).

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

65004428520 is a wasteful number, since it uses less digits than its factorization.

65004428520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180567874 (or 180567867 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

Adding to 65004428520 its reverse (2582440056), we get a palindrome (67586868576).

The spelling of 65004428520 in words is "sixty-five billion, four million, four hundred twenty-eight thousand, five hundred twenty".