5656021605 has 48 divisors (see below), whose sum is σ = 10656696960. Its totient is φ = 2758449024.

The previous prime is 5656021603. The next prime is 5656021619. The reversal of 5656021605 is 5061206565.

It is a happy number.

It is not a de Polignac number, because 5656021605 - 2¹ = 5656021603 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5656021605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5656021603) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 17416 + ... + 107774.

It is an arithmetic number, because the mean of its divisors is an integer number (222014520).

Almost surely, 2^5656021605 is an apocalyptic number.

It is an amenable number.

5656021605 is a deficient number, since it is larger than the sum of its proper divisors (5000675355).

5656021605 is a wasteful number, since it uses less digits than its factorization.

5656021605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90490 (or 90487 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 5656021605 is about 75206.5263457900. The cubic root of 5656021605 is about 1781.7100097975.

The spelling of 5656021605 in words is "five billion, six hundred fifty-six million, twenty-one thousand, six hundred five".