6565874556 has 12 divisors (see below), whose sum is σ = 15320373992. Its totient is φ = 2188624848.

The previous prime is 6565874537. The next prime is 6565874587. The reversal of 6565874556 is 6554785656.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×6565874556² = 86221417370256394272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6565874496 and 6565874505.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273578095 + ... + 273578118.

Almost surely, 2^6565874556 is an apocalyptic number.

It is an amenable number.

6565874556 is an abundant number, since it is smaller than the sum of its proper divisors (8754499436).

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

6565874556 is a wasteful number, since it uses less digits than its factorization.

6565874556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547156220 (or 547156218 counting only the distinct ones).

The product of its digits is 30240000, while the sum is 57.

The square root of 6565874556 is about 81030.0842650432. The cubic root of 6565874556 is about 1872.5389512653.

Subtracting from 6565874556 its reverse (6554785656), we obtain a square (11088900 = 3330²).

The spelling of 6565874556 in words is "six billion, five hundred sixty-five million, eight hundred seventy-four thousand, five hundred fifty-six".