5256539136 has 132 divisors (see below), whose sum is σ = 15406491672. Its totient is φ = 1725825024.

The previous prime is 5256539083. The next prime is 5256539147. The reversal of 5256539136 is 6319356525.

5256539136 is a `hidden beast` number, since 5 + 256 + 5 + 391 + 3 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 5256539091 and 5256539100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 613216 + ... + 621728.

It is an arithmetic number, because the mean of its divisors is an integer number (116715846).

Almost surely, 2^5256539136 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 5256539136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7703245836).

5256539136 is an abundant number, since it is smaller than the sum of its proper divisors (10149952536).

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

5256539136 is a wasteful number, since it uses less digits than its factorization.

5256539136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8606 (or 8585 counting only the distinct ones).

The product of its digits is 729000, while the sum is 45.

The square root of 5256539136 is about 72501.9940139580. The cubic root of 5256539136 is about 1738.7346170557.

The spelling of 5256539136 in words is "five billion, two hundred fifty-six million, five hundred thirty-nine thousand, one hundred thirty-six".