6469800655721 has 8 divisors (see below), whose sum is σ = 6968104525704. Its totient is φ = 5971586342400.

The previous prime is 6469800655679. The next prime is 6469800655727. The reversal of 6469800655721 is 1275560089646.

It can be written as a sum of positive squares in 4 ways, for example, as 7121503321 + 6462679152400 = 84389^2 + 2542180^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6469800655721 - 2³⁰ = 6468726913897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6469800655727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22239080 + ... + 22528121.

It is an arithmetic number, because the mean of its divisors is an integer number (871013065713).

Almost surely, 2^{6469800655721} is an apocalyptic number.

It is an amenable number.

6469800655721 is a deficient number, since it is larger than the sum of its proper divisors (498303869983).

6469800655721 is a wasteful number, since it uses less digits than its factorization.

6469800655721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44778331.

The product of its (nonzero) digits is 21772800, while the sum is 59.

The spelling of 6469800655721 in words is "six trillion, four hundred sixty-nine billion, eight hundred million, six hundred fifty-five thousand, seven hundred twenty-one".