5561521024 has 64 divisors (see below), whose sum is σ = 11544768000. Its totient is φ = 2665704960.

The previous prime is 5561521019. The next prime is 5561521039. The reversal of 5561521024 is 4201251655.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×5561521024² = 61861032200788017152, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 418027 + ... + 431125.

It is an arithmetic number, because the mean of its divisors is an integer number (180387000).

Almost surely, 2^5561521024 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 5561521024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5772384000).

5561521024 is an abundant number, since it is smaller than the sum of its proper divisors (5983246976).

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

5561521024 is a wasteful number, since it uses less digits than its factorization.

5561521024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13251 (or 13239 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 5561521024 is about 74575.6060920728. The cubic root of 5561521024 is about 1771.7313141560.

Adding to 5561521024 its reverse (4201251655), we get a palindrome (9762772679).

The spelling of 5561521024 in words is "five billion, five hundred sixty-one million, five hundred twenty-one thousand, twenty-four".