2646317824421 has 4 divisors (see below), whose sum is σ = 2710862161644. Its totient is φ = 2581773487200.

The previous prime is 2646317824361. The next prime is 2646317824439. The reversal of 2646317824421 is 1244287136462.

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 327200016196 + 2319117808225 = 572014^2 + 1522865^2 .

It is a cyclic number.

It is not a de Polignac number, because 2646317824421 - 2¹⁸ = 2646317562277 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2646317824421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2646317824021) 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, 32272168550 + ... + 32272168631.

It is an arithmetic number, because the mean of its divisors is an integer number (677715540411).

Almost surely, 2^{2646317824421} is an apocalyptic number.

It is an amenable number.

2646317824421 is a deficient number, since it is larger than the sum of its proper divisors (64544337223).

2646317824421 is an equidigital number, since it uses as much as digits as its factorization.

2646317824421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64544337222.

The product of its digits is 3096576, while the sum is 50.

The spelling of 2646317824421 in words is "two trillion, six hundred forty-six billion, three hundred seventeen million, eight hundred twenty-four thousand, four hundred twenty-one".