5255665524 has 72 divisors (see below), whose sum is σ = 13623671880. Its totient is φ = 1707340800.

The previous prime is 5255665501. The next prime is 5255665529. The reversal of 5255665524 is 4255665525.

5255665524 is a `hidden beast` number, since 525 + 56 + 6 + 55 + 24 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 11009124 + 5244656400 = 3318^2 + 72420^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 5255665524.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5255665529) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2539162 + ... + 2541230.

It is an arithmetic number, because the mean of its divisors is an integer number (189217665).

Almost surely, 2^5255665524 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 5255665524, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6811835940).

5255665524 is an abundant number, since it is smaller than the sum of its proper divisors (8368006356).

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

5255665524 is a wasteful number, since it uses less digits than its factorization.

5255665524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3841 (or 3836 counting only the distinct ones).

The product of its digits is 1800000, while the sum is 45.

The square root of 5255665524 is about 72495.9690189737. The cubic root of 5255665524 is about 1738.6382885562.

Subtracting from 5255665524 its reverse (4255665525), we obtain a palindrome (999999999).

The spelling of 5255665524 in words is "five billion, two hundred fifty-five million, six hundred sixty-five thousand, five hundred twenty-four".