2646999601 has 3 divisors (see below), whose sum is σ = 2647051051. Its totient is φ = 2646948152.

The previous prime is 2646999581. The next prime is 2646999613. The reversal of 2646999601 is 1069996462.

The square root of 2646999601 is 51449.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 815159601 + 1831840000 = 28551^2 + 42800^2 .

It is not a de Polignac number, because 2646999601 - 2¹⁹ = 2646475313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2646999001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 25725 + ... + 77173.

Almost surely, 2^2646999601 is an apocalyptic number.

2646999601 is the 51449-th square number.

2646999601 is the 25725-th centered octagonal number.

It is an amenable number.

2646999601 is a deficient number, since it is larger than the sum of its proper divisors (51450).

2646999601 is an frugal number, since it uses more digits than its factorization.

2646999601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102898 (or 51449 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 52.

The cubic root of 2646999601 is about 1383.3050379013.

The spelling of 2646999601 in words is "two billion, six hundred forty-six million, nine hundred ninety-nine thousand, six hundred one".