2685708311217 has 16 divisors (see below), whose sum is σ = 3664874830848. Its totient is φ = 1748521832400.

The previous prime is 2685708311207. The next prime is 2685708311227. The reversal of 2685708311217 is 7121138075862.

It is an interprime number because it is at equal distance from previous prime (2685708311207) and next prime (2685708311227).

It is not a de Polignac number, because 2685708311217 - 2²² = 2685704116913 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2685708311217.

It is not an unprimeable number, because it can be changed into a prime (2685708311207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1125909 + ... + 2576642.

It is an arithmetic number, because the mean of its divisors is an integer number (229054676928).

Almost surely, 2^{2685708311217} is an apocalyptic number.

It is an amenable number.

2685708311217 is a deficient number, since it is larger than the sum of its proper divisors (979166519631).

2685708311217 is a wasteful number, since it uses less digits than its factorization.

2685708311217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3708220.

The product of its (nonzero) digits is 1128960, while the sum is 51.

The spelling of 2685708311217 in words is "two trillion, six hundred eighty-five billion, seven hundred eight million, three hundred eleven thousand, two hundred seventeen".