2109798647633 has 4 divisors (see below), whose sum is σ = 2113993078848. Its totient is φ = 2105604216420.

The previous prime is 2109798647629. The next prime is 2109798647689. The reversal of 2109798647633 is 3367468979012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2109798647633 - 2² = 2109798647629 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 2109798647633.

It is not an unprimeable number, because it can be changed into a prime (2109798647623) 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, 2097214853 + ... + 2097215858.

It is an arithmetic number, because the mean of its divisors is an integer number (528498269712).

Almost surely, 2^{2109798647633} is an apocalyptic number.

It is an amenable number.

2109798647633 is a deficient number, since it is larger than the sum of its proper divisors (4194431215).

2109798647633 is an equidigital number, since it uses as much as digits as its factorization.

2109798647633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4194431214.

The product of its (nonzero) digits is 82301184, while the sum is 65.

The spelling of 2109798647633 in words is "two trillion, one hundred nine billion, seven hundred ninety-eight million, six hundred forty-seven thousand, six hundred thirty-three".