5115561638 has 16 divisors (see below), whose sum is σ = 8372990736. Its totient is φ = 2324679840.

The previous prime is 5115561637. The next prime is 5115561673. The reversal of 5115561638 is 8361655115.

It is a junction number, because it is equal to n+sod(n) for n = 5115561595 and 5115561604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5115561637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69620 + ... + 122792.

It is an arithmetic number, because the mean of its divisors is an integer number (523311921).

Almost surely, 2^5115561638 is an apocalyptic number.

5115561638 is a deficient number, since it is larger than the sum of its proper divisors (3257429098).

5115561638 is a wasteful number, since it uses less digits than its factorization.

5115561638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57559.

The product of its digits is 108000, while the sum is 41.

The square root of 5115561638 is about 71523.1545585064. The cubic root of 5115561638 is about 1723.0495788258.

The spelling of 5115561638 in words is "five billion, one hundred fifteen million, five hundred sixty-one thousand, six hundred thirty-eight".