5581493540 has 24 divisors (see below), whose sum is σ = 13395584832. Its totient is φ = 1913654880.

The previous prime is 5581493501. The next prime is 5581493581. The reversal of 5581493540 is 453941855.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 5581493491 and 5581493500.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19933766 + ... + 19934045.

It is an arithmetic number, because the mean of its divisors is an integer number (558149368).

Almost surely, 2^5581493540 is an apocalyptic number.

It is an amenable number.

5581493540 is an abundant number, since it is smaller than the sum of its proper divisors (7814091292).

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

5581493540 is a wasteful number, since it uses less digits than its factorization.

5581493540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39867827 (or 39867825 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 44.

The square root of 5581493540 is about 74709.3939207112. The cubic root of 5581493540 is about 1773.8496589335.

The spelling of 5581493540 in words is "five billion, five hundred eighty-one million, four hundred ninety-three thousand, five hundred forty".