6530021633 has 4 divisors (see below), whose sum is σ = 6530187780. Its totient is φ = 6529855488.

The previous prime is 6530021551. The next prime is 6530021651. The reversal of 6530021633 is 3361200356.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3012582769 + 3517438864 = 54887^2 + 59308^2 .

It is a cyclic number.

It is not a de Polignac number, because 6530021633 - 2¹⁴ = 6530005249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6530021596 and 6530021605.

It is not an unprimeable number, because it can be changed into a prime (6530020633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12641 + ... + 114977.

It is an arithmetic number, because the mean of its divisors is an integer number (1632546945).

Almost surely, 2^6530021633 is an apocalyptic number.

It is an amenable number.

6530021633 is a deficient number, since it is larger than the sum of its proper divisors (166147).

6530021633 is a wasteful number, since it uses less digits than its factorization.

6530021633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166146.

The product of its (nonzero) digits is 9720, while the sum is 29.

The square root of 6530021633 is about 80808.5492568701. The cubic root of 6530021633 is about 1869.1243990022.

Adding to 6530021633 its reverse (3361200356), we get a palindrome (9891221989).

The spelling of 6530021633 in words is "six billion, five hundred thirty million, twenty-one thousand, six hundred thirty-three".