5481111581 has 8 divisors (see below), whose sum is σ = 6172278528. Its totient is φ = 4822092000.

The previous prime is 5481111569. The next prime is 5481111589. The reversal of 5481111581 is 1851111845.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-5481111581 is a prime.

It is a super-2 number, since 2×5481111581² = 60085168326744639122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5481111589) 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, 8036480 + ... + 8037161.

It is an arithmetic number, because the mean of its divisors is an integer number (771534816).

Almost surely, 2^5481111581 is an apocalyptic number.

It is an amenable number.

5481111581 is a deficient number, since it is larger than the sum of its proper divisors (691166947).

5481111581 is a wasteful number, since it uses less digits than its factorization.

5481111581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16073683.

The product of its digits is 6400, while the sum is 35.

The square root of 5481111581 is about 74034.5296533989. The cubic root of 5481111581 is about 1763.1511622162.

The spelling of 5481111581 in words is "five billion, four hundred eighty-one million, one hundred eleven thousand, five hundred eighty-one".