5591020056 has 24 divisors (see below), whose sum is σ = 13978465980. Its totient is φ = 1863551248.

The previous prime is 5591020007. The next prime is 5591020069. The reversal of 5591020056 is 6500201955.

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 5591019999 and 5591020026.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 358681 + ... + 373943.

Almost surely, 2^5591020056 is an apocalyptic number.

It is an amenable number.

5591020056 is an abundant number, since it is smaller than the sum of its proper divisors (8387445924).

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

5591020056 is an frugal number, since it uses more digits than its factorization.

5591020056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30535 (or 15268 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 33.

The square root of 5591020056 is about 74773.1238881993. The cubic root of 5591020056 is about 1774.8582899232.

The spelling of 5591020056 in words is "five billion, five hundred ninety-one million, twenty thousand, fifty-six".