2109872652089 has 2 divisors, whose sum is σ = 2109872652090. Its totient is φ = 2109872652088.

The previous prime is 2109872652053. The next prime is 2109872652143. The reversal of 2109872652089 is 9802562789012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1752856842025 + 357015810064 = 1323955^2 + 597508^2 .

It is a cyclic number.

It is not a de Polignac number, because 2109872652089 - 2²⁰ = 2109871603513 is a prime.

It is not a weakly prime, because it can be changed into another prime (2109872652989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1054936326044 + 1054936326045.

It is an arithmetic number, because the mean of its divisors is an integer number (1054936326045).

Almost surely, 2^{2109872652089} is an apocalyptic number.

It is an amenable number.

2109872652089 is a deficient number, since it is larger than the sum of its proper divisors (1).

2109872652089 is an equidigital number, since it uses as much as digits as its factorization.

2109872652089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8709120, while the sum is 59.

The spelling of 2109872652089 in words is "two trillion, one hundred nine billion, eight hundred seventy-two million, six hundred fifty-two thousand, eighty-nine".