2646646445 has 16 divisors (see below), whose sum is σ = 3453688368. Its totient is φ = 1938908160.

The previous prime is 2646646423. The next prime is 2646646447. The reversal of 2646646445 is 5446466462.

It can be written as a sum of positive squares in 8 ways, for example, as 266962921 + 2379683524 = 16339^2 + 48782^2 .

It is not a de Polignac number, because 2646646445 - 2²⁶ = 2579537581 is a prime.

It is a super-2 number, since 2×2646646445² = 14009474809662276050, which contains 22 as substring.

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 2646646445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2646646447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 417626 + ... + 423915.

It is an arithmetic number, because the mean of its divisors is an integer number (215855523).

Almost surely, 2^2646646445 is an apocalyptic number.

It is an amenable number.

2646646445 is a deficient number, since it is larger than the sum of its proper divisors (807041923).

2646646445 is a wasteful number, since it uses less digits than its factorization.

2646646445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841600.

The product of its digits is 3317760, while the sum is 47.

The square root of 2646646445 is about 51445.5677877113. The cubic root of 2646646445 is about 1383.2435161439.

The spelling of 2646646445 in words is "two billion, six hundred forty-six million, six hundred forty-six thousand, four hundred forty-five".