5481891855 has 48 divisors (see below), whose sum is σ = 10383085440. Its totient is φ = 2653444800.

The previous prime is 5481891823. The next prime is 5481891887. The reversal of 5481891855 is 5581981845.

5481891855 is a `hidden beast` number, since 5 + 481 + 89 + 1 + 85 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (5481891823) and next prime (5481891887).

It is not a de Polignac number, because 5481891855 - 2⁵ = 5481891823 is a prime.

It is a super-2 number, since 2×5481891855² = 60102276619830682050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 297460 + ... + 315350.

It is an arithmetic number, because the mean of its divisors is an integer number (216314280).

Almost surely, 2^5481891855 is an apocalyptic number.

5481891855 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

5481891855 is a deficient number, since it is larger than the sum of its proper divisors (4901193585).

5481891855 is a wasteful number, since it uses less digits than its factorization.

5481891855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18532 (or 18529 counting only the distinct ones).

The product of its digits is 2304000, while the sum is 54.

The square root of 5481891855 is about 74039.7991285768. The cubic root of 5481891855 is about 1763.2348238185.

The spelling of 5481891855 in words is "five billion, four hundred eighty-one million, eight hundred ninety-one thousand, eight hundred fifty-five".