2639845609211 has 4 divisors (see below), whose sum is σ = 2639849732424. Its totient is φ = 2639841486000.

The previous prime is 2639845609207. The next prime is 2639845609217. The reversal of 2639845609211 is 1129065489362.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2639845609211 - 2² = 2639845609207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2639845609217) 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, 872705 + ... + 2457906.

It is an arithmetic number, because the mean of its divisors is an integer number (659962433106).

Almost surely, 2^{2639845609211} is an apocalyptic number.

2639845609211 is a deficient number, since it is larger than the sum of its proper divisors (4123213).

2639845609211 is an equidigital number, since it uses as much as digits as its factorization.

2639845609211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4123212.

The product of its (nonzero) digits is 5598720, while the sum is 56.

The spelling of 2639845609211 in words is "two trillion, six hundred thirty-nine billion, eight hundred forty-five million, six hundred nine thousand, two hundred eleven".