2651045009209 has 3 divisors (see below), whose sum is σ = 2651046637413. Its totient is φ = 2651043381006.

The previous prime is 2651045009203. The next prime is 2651045009213. The reversal of 2651045009209 is 9029005401562.

The square root of 2651045009209 is 1628203.

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

2651045009209 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 is not a de Polignac number, because 2651045009209 - 2²³ = 2651036620601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2651045009203) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 814102 + ... + 2442304.

It is an arithmetic number, because the mean of its divisors is an integer number (883682212471).

Almost surely, 2^{2651045009209} is an apocalyptic number.

2651045009209 is the 1628203-rd square number.

2651045009209 is the 814102-nd centered octagonal number.

It is an amenable number.

2651045009209 is a deficient number, since it is larger than the sum of its proper divisors (1628204).

2651045009209 is an frugal number, since it uses more digits than its factorization.

2651045009209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3256406 (or 1628203 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 43.

The spelling of 2651045009209 in words is "two trillion, six hundred fifty-one billion, forty-five million, nine thousand, two hundred nine".