5261636448 has 144 divisors (see below), whose sum is σ = 15859957680. Its totient is φ = 1697034240.

The previous prime is 5261636441. The next prime is 5261636453. The reversal of 5261636448 is 8446361625.

5261636448 is a `hidden beast` number, since 5 + 2 + 6 + 1 + 636 + 4 + 4 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×5261636448² = 55369636221844113408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5261636441) 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, 827136 + ... + 833472.

It is an arithmetic number, because the mean of its divisors is an integer number (110138595).

Almost surely, 2^5261636448 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 5261636448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7929978840).

5261636448 is an abundant number, since it is smaller than the sum of its proper divisors (10598321232).

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

5261636448 is a wasteful number, since it uses less digits than its factorization.

5261636448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6418 (or 6373 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The square root of 5261636448 is about 72537.1384050956. The cubic root of 5261636448 is about 1739.2964575455.

The spelling of 5261636448 in words is "five billion, two hundred sixty-one million, six hundred thirty-six thousand, four hundred forty-eight".