5521081656 has 64 divisors (see below), whose sum is σ = 14118688800. Its totient is φ = 1798504448.

The previous prime is 5521081649. The next prime is 5521081669. The reversal of 5521081656 is 6561801255.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 318460 + ... + 335348.

Almost surely, 2^5521081656 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 5521081656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7059344400).

5521081656 is an abundant number, since it is smaller than the sum of its proper divisors (8597607144).

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

5521081656 is a wasteful number, since it uses less digits than its factorization.

5521081656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17208 (or 17204 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 39.

The square root of 5521081656 is about 74303.9814276463. The cubic root of 5521081656 is about 1767.4266130977.

The spelling of 5521081656 in words is "five billion, five hundred twenty-one million, eighty-one thousand, six hundred fifty-six".