5656021065 has 12 divisors (see below), whose sum is σ = 9803769924. Its totient is φ = 3016544544.

The previous prime is 5656021051. The next prime is 5656021069. The reversal of 5656021065 is 5601206565.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4384955961 + 1271065104 = 66219^2 + 35652^2 .

It is not a de Polignac number, because 5656021065 - 2⁹ = 5656020553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5656021069) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62844634 + ... + 62844723.

It is an arithmetic number, because the mean of its divisors is an integer number (816980827).

Almost surely, 2^5656021065 is an apocalyptic number.

It is an amenable number.

5656021065 is a deficient number, since it is larger than the sum of its proper divisors (4147748859).

5656021065 is a wasteful number, since it uses less digits than its factorization.

5656021065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125689368 (or 125689365 counting only the distinct ones).

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

The square root of 5656021065 is about 75206.5227556759. The cubic root of 5656021065 is about 1781.7099530954.

The spelling of 5656021065 in words is "five billion, six hundred fifty-six million, twenty-one thousand, sixty-five".