5408816581 has 8 divisors (see below), whose sum is σ = 6226626240. Its totient is φ = 4602287328.

The previous prime is 5408816573. The next prime is 5408816591. The reversal of 5408816581 is 1856188045.

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

It is a cyclic number.

It is not a de Polignac number, because 5408816581 - 2³ = 5408816573 is a prime.

It is a super-2 number, since 2×5408816581² = 58510593613801059122, 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 (5408816561) 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, 2819071 + ... + 2820988.

It is an arithmetic number, because the mean of its divisors is an integer number (778328280).

Almost surely, 2^5408816581 is an apocalyptic number.

It is an amenable number.

5408816581 is a deficient number, since it is larger than the sum of its proper divisors (817809659).

5408816581 is a wasteful number, since it uses less digits than its factorization.

5408816581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5640203.

The product of its (nonzero) digits is 307200, while the sum is 46.

The square root of 5408816581 is about 73544.6570527051. The cubic root of 5408816581 is about 1755.3649326202.

The spelling of 5408816581 in words is "five billion, four hundred eight million, eight hundred sixteen thousand, five hundred eighty-one".