5418391638 has 16 divisors (see below), whose sum is σ = 11821945536. Its totient is φ = 1641936840.

The previous prime is 5418391619. The next prime is 5418391651. The reversal of 5418391638 is 8361938145.

It is a congruent number.

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, 41048356 + ... + 41048487.

It is an arithmetic number, because the mean of its divisors is an integer number (738871596).

Almost surely, 2^5418391638 is an apocalyptic number.

5418391638 is an abundant number, since it is smaller than the sum of its proper divisors (6403553898).

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

5418391638 is a wasteful number, since it uses less digits than its factorization.

5418391638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82096859.

The product of its digits is 622080, while the sum is 48.

The square root of 5418391638 is about 73609.7251591120. The cubic root of 5418391638 is about 1756.4001443416.

The spelling of 5418391638 in words is "five billion, four hundred eighteen million, three hundred ninety-one thousand, six hundred thirty-eight".