2684686202129 has 2 divisors, whose sum is σ = 2684686202130. Its totient is φ = 2684686202128.

The previous prime is 2684686202089. The next prime is 2684686202137. The reversal of 2684686202129 is 9212026864862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1607557731025 + 1077128471104 = 1267895^2 + 1037848^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2684686202129 is a prime.

It is not a weakly prime, because it can be changed into another prime (2684686204129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1342343101064 + 1342343101065.

It is an arithmetic number, because the mean of its divisors is an integer number (1342343101065).

Almost surely, 2^{2684686202129} is an apocalyptic number.

It is an amenable number.

2684686202129 is a deficient number, since it is larger than the sum of its proper divisors (1).

2684686202129 is an equidigital number, since it uses as much as digits as its factorization.

2684686202129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7962624, while the sum is 56.

The spelling of 2684686202129 in words is "two trillion, six hundred eighty-four billion, six hundred eighty-six million, two hundred two thousand, one hundred twenty-nine".