6530869821 has 32 divisors (see below), whose sum is σ = 10570625280. Its totient is φ = 3501259776.

The previous prime is 6530869817. The next prime is 6530869837. The reversal of 6530869821 is 1289680356.

It is a happy number.

It is not a de Polignac number, because 6530869821 - 2² = 6530869817 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6530869811) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84315 + ... + 142023.

It is an arithmetic number, because the mean of its divisors is an integer number (330332040).

Almost surely, 2^6530869821 is an apocalyptic number.

It is an amenable number.

6530869821 is a deficient number, since it is larger than the sum of its proper divisors (4039755459).

6530869821 is a wasteful number, since it uses less digits than its factorization.

6530869821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58053.

The product of its (nonzero) digits is 622080, while the sum is 48.

The square root of 6530869821 is about 80813.7972192868. The cubic root of 6530869821 is about 1869.2053226877.

The spelling of 6530869821 in words is "six billion, five hundred thirty million, eight hundred sixty-nine thousand, eight hundred twenty-one".