5251806720 has 800 divisors, whose sum is σ = 20914375680. Its totient is φ = 1254113280.

The previous prime is 5251806709. The next prime is 5251806733. The reversal of 5251806720 is 276081525.

It is a happy number.

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 79 ways as a sum of consecutive naturals, for example, 122135019 + ... + 122135061.

Almost surely, 2^5251806720 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 5251806720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10457187840).

5251806720 is an abundant number, since it is smaller than the sum of its proper divisors (15662568960).

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

5251806720 is a wasteful number, since it uses less digits than its factorization.

5251806720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128 (or 103 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 5251806720 is about 72469.3502109685. The cubic root of 5251806720 is about 1738.2126712235.

The spelling of 5251806720 in words is "five billion, two hundred fifty-one million, eight hundred six thousand, seven hundred twenty".