5538399540 has 96 divisors (see below), whose sum is σ = 16231138560. Its totient is φ = 1408382976.

The previous prime is 5538399533. The next prime is 5538399541. The reversal of 5538399540 is 459938355.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5538399541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 459106 + ... + 471014.

It is an arithmetic number, because the mean of its divisors is an integer number (169074360).

Almost surely, 2^5538399540 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 5538399540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8115569280).

5538399540 is an abundant number, since it is smaller than the sum of its proper divisors (10692739020).

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

5538399540 is a wasteful number, since it uses less digits than its factorization.

5538399540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12281 (or 12279 counting only the distinct ones).

The product of its (nonzero) digits is 2916000, while the sum is 51.

The square root of 5538399540 is about 74420.4242127119. The cubic root of 5538399540 is about 1769.2726367573.

The spelling of 5538399540 in words is "five billion, five hundred thirty-eight million, three hundred ninety-nine thousand, five hundred forty".