5661509048 has 64 divisors (see below), whose sum is σ = 12118196160. Its totient is φ = 2456487936.

The previous prime is 5661509047. The next prime is 5661509053. The reversal of 5661509048 is 8409051665.

It is a Cunningham number, because it is equal to 75243²-1.

It is a super-3 number, since 3×5661509048³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5661509047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2557190 + ... + 2559402.

It is an arithmetic number, because the mean of its divisors is an integer number (189346815).

Almost surely, 2^5661509048 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5661509048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6059098080).

5661509048 is an abundant number, since it is smaller than the sum of its proper divisors (6456687112).

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

5661509048 is a wasteful number, since it uses less digits than its factorization.

5661509048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3696 (or 3692 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 5661509048 is about 75242.9999933549. Note that the first 5 decimals coincide. The cubic root of 5661509048 is about 1782.2860255102.

The spelling of 5661509048 in words is "five billion, six hundred sixty-one million, five hundred nine thousand, forty-eight".