1688315911573 has 2 divisors, whose sum is σ = 1688315911574. Its totient is φ = 1688315911572.

The previous prime is 1688315911489. The next prime is 1688315911609. The reversal of 1688315911573 is 3751195138861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1442321735089 + 245994176484 = 1200967^2 + 495978^2 .

It is a cyclic number.

It is not a de Polignac number, because 1688315911573 - 2¹³ = 1688315903381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1688315911273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 844157955786 + 844157955787.

It is an arithmetic number, because the mean of its divisors is an integer number (844157955787).

Almost surely, 2^{1688315911573} is an apocalyptic number.

It is an amenable number.

1688315911573 is a deficient number, since it is larger than the sum of its proper divisors (1).

1688315911573 is an equidigital number, since it uses as much as digits as its factorization.

1688315911573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5443200, while the sum is 58.

The spelling of 1688315911573 in words is "one trillion, six hundred eighty-eight billion, three hundred fifteen million, nine hundred eleven thousand, five hundred seventy-three".