5538256640 has 288 divisors, whose sum is σ = 15873736704. Its totient is φ = 1811496960.

The previous prime is 5538256639. The next prime is 5538256697. The reversal of 5538256640 is 466528355.

It is a super-2 number, since 2×5538256640² = 61344573221008179200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 5538256591 and 5538256600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35275442 + ... + 35275598.

Almost surely, 2^5538256640 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 5538256640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7936868352).

5538256640 is an abundant number, since it is smaller than the sum of its proper divisors (10335480064).

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

5538256640 is a wasteful number, since it uses less digits than its factorization.

5538256640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343 (or 329 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 44.

The square root of 5538256640 is about 74419.4641206183. The cubic root of 5538256640 is about 1769.2574198923.

The spelling of 5538256640 in words is "five billion, five hundred thirty-eight million, two hundred fifty-six thousand, six hundred forty".