5128643520 has 896 divisors, whose sum is σ = 24333281280. Its totient is φ = 982056960.

The previous prime is 5128643501. The next prime is 5128643561. The reversal of 5128643520 is 253468215.

5128643520 is a `hidden beast` number, since 5 + 1 + 2 + 8 + 643 + 5 + 2 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 8648344 + ... + 8648936.

It is an arithmetic number, because the mean of its divisors is an integer number (27157680).

Almost surely, 2^5128643520 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 5128643520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12166640640).

5128643520 is an abundant number, since it is smaller than the sum of its proper divisors (19204637760).

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

5128643520 is a wasteful number, since it uses less digits than its factorization.

5128643520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650 (or 634 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 5128643520 is about 71614.5482426581. The cubic root of 5128643520 is about 1724.5170973413.

The spelling of 5128643520 in words is "five billion, one hundred twenty-eight million, six hundred forty-three thousand, five hundred twenty".