2684686202109 has 6 divisors (see below), whose sum is σ = 3877880069726. Its totient is φ = 1789790801400.

The previous prime is 2684686202089. The next prime is 2684686202129. The reversal of 2684686202109 is 9012026864862.

2684686202109 is a `hidden beast` number, since 2 + 6 + 8 + 4 + 6 + 8 + 620 + 2 + 1 + 0 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (2684686202089) and next prime (2684686202129).

It can be written as a sum of positive squares in only one way, i.e., 1905650485209 + 779035716900 = 1380453^2 + 882630^2 .

It is not a de Polignac number, because 2684686202109 - 2⁸ = 2684686201853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2684686202129) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 149149233442 + ... + 149149233459.

Almost surely, 2^{2684686202109} is an apocalyptic number.

It is an amenable number.

2684686202109 is a deficient number, since it is larger than the sum of its proper divisors (1193193867617).

2684686202109 is a wasteful number, since it uses less digits than its factorization.

2684686202109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298298466907 (or 298298466904 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 54.

The spelling of 2684686202109 in words is "two trillion, six hundred eighty-four billion, six hundred eighty-six million, two hundred two thousand, one hundred nine".