2684155667317 has 2 divisors, whose sum is σ = 2684155667318. Its totient is φ = 2684155667316.

The previous prime is 2684155667269. The next prime is 2684155667339. The reversal of 2684155667317 is 7137665514862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2074547628241 + 609608039076 = 1440329^2 + 780774^2 .

It is a cyclic number.

It is not a de Polignac number, because 2684155667317 - 2³¹ = 2682008183669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2684155667717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1342077833658 + 1342077833659.

It is an arithmetic number, because the mean of its divisors is an integer number (1342077833659).

Almost surely, 2^{2684155667317} is an apocalyptic number.

It is an amenable number.

2684155667317 is a deficient number, since it is larger than the sum of its proper divisors (1).

2684155667317 is an equidigital number, since it uses as much as digits as its factorization.

2684155667317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50803200, while the sum is 61.

The spelling of 2684155667317 in words is "two trillion, six hundred eighty-four billion, one hundred fifty-five million, six hundred sixty-seven thousand, three hundred seventeen".