5221615656 has 64 divisors (see below), whose sum is σ = 13228326720. Its totient is φ = 1717355520.

The previous prime is 5221615643. The next prime is 5221615657. The reversal of 5221615656 is 6565161225.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (5221615657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2415216 + ... + 2417376.

It is an arithmetic number, because the mean of its divisors is an integer number (206692605).

Almost surely, 2^5221615656 is an apocalyptic number.

It is an amenable number.

5221615656 is an abundant number, since it is smaller than the sum of its proper divisors (8006711064).

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

5221615656 is a wasteful number, since it uses less digits than its factorization.

5221615656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3466 (or 3462 counting only the distinct ones).

The product of its digits is 108000, while the sum is 39.

The square root of 5221615656 is about 72260.7476850330. The cubic root of 5221615656 is about 1734.8754467694.

The spelling of 5221615656 in words is "five billion, two hundred twenty-one million, six hundred fifteen thousand, six hundred fifty-six".