6506921820969 has 48 divisors (see below), whose sum is σ = 9750293699328. Its totient is φ = 4179177939456.

The previous prime is 6506921820941. The next prime is 6506921821033. The reversal of 6506921820969 is 9690281296056.

6506921820969 is a `hidden beast` number, since 6 + 506 + 9 + 2 + 18 + 20 + 96 + 9 = 666.

It is not a de Polignac number, because 6506921820969 - 2⁹ = 6506921820457 is a prime.

It is a super-2 number, since 2×6506921820969² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6506921821969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6648129 + ... + 7563825.

It is an arithmetic number, because the mean of its divisors is an integer number (203131118736).

Almost surely, 2^{6506921820969} is an apocalyptic number.

It is an amenable number.

6506921820969 is a deficient number, since it is larger than the sum of its proper divisors (3243371878359).

6506921820969 is a wasteful number, since it uses less digits than its factorization.

6506921820969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916014 (or 916011 counting only the distinct ones).

The product of its (nonzero) digits is 25194240, while the sum is 63.

The spelling of 6506921820969 in words is "six trillion, five hundred six billion, nine hundred twenty-one million, eight hundred twenty thousand, nine hundred sixty-nine".