64420767528 has 256 divisors, whose sum is σ = 192510259200. Its totient is φ = 17773240320.

The previous prime is 64420767527. The next prime is 64420767529. The reversal of 64420767528 is 82576702446.

It is an interprime number because it is at equal distance from previous prime (64420767527) and next prime (64420767529).

It is not an unprimeable number, because it can be changed into a prime (64420767527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13222933 + ... + 13227803.

It is an arithmetic number, because the mean of its divisors is an integer number (751993200).

Almost surely, 2^64420767528 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64420767528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96255129600).

64420767528 is an abundant number, since it is smaller than the sum of its proper divisors (128089491672).

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

64420767528 is a wasteful number, since it uses less digits than its factorization.

64420767528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5032 (or 5028 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 51.

The spelling of 64420767528 in words is "sixty-four billion, four hundred twenty million, seven hundred sixty-seven thousand, five hundred twenty-eight".