5481891805 has 16 divisors (see below), whose sum is σ = 7119907200. Its totient is φ = 4027814208.

The previous prime is 5481891803. The next prime is 5481891809. The reversal of 5481891805 is 5081981845.

It is a cyclic number.

It is not a de Polignac number, because 5481891805 - 2¹ = 5481891803 is a prime.

It is a super-2 number, since 2×5481891805² = 60102275523452316050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5481891803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198967 + ... + 224836.

It is an arithmetic number, because the mean of its divisors is an integer number (444994200).

Almost surely, 2^5481891805 is an apocalyptic number.

It is an amenable number.

5481891805 is a deficient number, since it is larger than the sum of its proper divisors (1638015395).

5481891805 is a wasteful number, since it uses less digits than its factorization.

5481891805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424020.

The product of its (nonzero) digits is 460800, while the sum is 49.

The square root of 5481891805 is about 74039.7987909205. The cubic root of 5481891805 is about 1763.2348184578.

The spelling of 5481891805 in words is "five billion, four hundred eighty-one million, eight hundred ninety-one thousand, eight hundred five".