2685802991 has 2 divisors, whose sum is σ = 2685802992. Its totient is φ = 2685802990.

The previous prime is 2685802961. The next prime is 2685803023. The reversal of 2685802991 is 1992085862.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2685802991 - 2³⁰ = 1612061167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2685802961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1342901495 + 1342901496.

It is an arithmetic number, because the mean of its divisors is an integer number (1342901496).

Almost surely, 2^2685802991 is an apocalyptic number.

2685802991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2685802991 is an equidigital number, since it uses as much as digits as its factorization.

2685802991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 622080, while the sum is 50.

The square root of 2685802991 is about 51824.7333905347. The cubic root of 2685802991 is about 1390.0317421111.

The spelling of 2685802991 in words is "two billion, six hundred eighty-five million, eight hundred two thousand, nine hundred ninety-one".