5256478920 has 384 divisors, whose sum is σ = 20167056000. Its totient is φ = 1083801600.

The previous prime is 5256478847. The next prime is 5256478921. The reversal of 5256478920 is 298746525.

It is a self number, because there is not a number n which added to its sum of digits gives 5256478920.

It is not an unprimeable number, because it can be changed into a prime (5256478921) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 11706856 + ... + 11707304.

It is an arithmetic number, because the mean of its divisors is an integer number (52518375).

Almost surely, 2^5256478920 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 5256478920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10083528000).

5256478920 is an abundant number, since it is smaller than the sum of its proper divisors (14910577080).

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

5256478920 is a wasteful number, since it uses less digits than its factorization.

5256478920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669 (or 658 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 48.

The square root of 5256478920 is about 72501.5787414316. The cubic root of 5256478920 is about 1738.7279777035.

The spelling of 5256478920 in words is "five billion, two hundred fifty-six million, four hundred seventy-eight thousand, nine hundred twenty".