5561108538 has 32 divisors (see below), whose sum is σ = 11486791680. Its totient is φ = 1793000880.

The previous prime is 5561108519. The next prime is 5561108549. The reversal of 5561108538 is 8358011655.

It is a self number, because there is not a number n which added to its sum of digits gives 5561108538.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 430173 + ... + 442911.

It is an arithmetic number, because the mean of its divisors is an integer number (358962240).

Almost surely, 2^5561108538 is an apocalyptic number.

5561108538 is an abundant number, since it is smaller than the sum of its proper divisors (5925683142).

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

5561108538 is a wasteful number, since it uses less digits than its factorization.

5561108538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15122.

The product of its (nonzero) digits is 144000, while the sum is 42.

The square root of 5561108538 is about 74572.8404849916. The cubic root of 5561108538 is about 1771.6875112450.

The spelling of 5561108538 in words is "five billion, five hundred sixty-one million, one hundred eight thousand, five hundred thirty-eight".