2104507786709 has 2 divisors, whose sum is σ = 2104507786710. Its totient is φ = 2104507786708.

The previous prime is 2104507786687. The next prime is 2104507786721. The reversal of 2104507786709 is 9076877054012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1996066003684 + 108441783025 = 1412822^2 + 329305^2 .

It is a cyclic number.

It is not a de Polignac number, because 2104507786709 - 2²⁰ = 2104506738133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2104507786769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052253893354 + 1052253893355.

It is an arithmetic number, because the mean of its divisors is an integer number (1052253893355).

Almost surely, 2^{2104507786709} is an apocalyptic number.

It is an amenable number.

2104507786709 is a deficient number, since it is larger than the sum of its proper divisors (1).

2104507786709 is an equidigital number, since it uses as much as digits as its factorization.

2104507786709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5927040, while the sum is 56.

The spelling of 2104507786709 in words is "two trillion, one hundred four billion, five hundred seven million, seven hundred eighty-six thousand, seven hundred nine".