5541566646 has 64 divisors (see below), whose sum is σ = 13840035840. Its totient is φ = 1437065760.

The previous prime is 5541566623. The next prime is 5541566659. The reversal of 5541566646 is 6466651455.

It is a junction number, because it is equal to n+sod(n) for n = 5541566595 and 5541566604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 289645 + ... + 308183.

It is an arithmetic number, because the mean of its divisors is an integer number (216250560).

Almost surely, 2^5541566646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5541566646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6920017920).

5541566646 is an abundant number, since it is smaller than the sum of its proper divisors (8298469194).

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

5541566646 is a wasteful number, since it uses less digits than its factorization.

5541566646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19209.

The product of its digits is 2592000, while the sum is 48.

The square root of 5541566646 is about 74441.6996447556. The cubic root of 5541566646 is about 1769.6098223874.

The spelling of 5541566646 in words is "five billion, five hundred forty-one million, five hundred sixty-six thousand, six hundred forty-six".