5581556394 has 16 divisors (see below), whose sum is σ = 11750645280. Its totient is φ = 1762596720.

The previous prime is 5581556381. The next prime is 5581556411. The reversal of 5581556394 is 4936551855.

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, 24480397 + ... + 24480624.

It is an arithmetic number, because the mean of its divisors is an integer number (734415330).

Almost surely, 2^5581556394 is an apocalyptic number.

5581556394 is an abundant number, since it is smaller than the sum of its proper divisors (6169088886).

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

5581556394 is a wasteful number, since it uses less digits than its factorization.

5581556394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48961045.

The product of its digits is 3240000, while the sum is 51.

The square root of 5581556394 is about 74709.8145761318. The cubic root of 5581556394 is about 1773.8563174337.

The spelling of 5581556394 in words is "five billion, five hundred eighty-one million, five hundred fifty-six thousand, three hundred ninety-four".