137643573517 has 2 divisors, whose sum is σ = 137643573518. Its totient is φ = 137643573516.

The previous prime is 137643573493. The next prime is 137643573523. The reversal of 137643573517 is 715375346731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130570931716 + 7072641801 = 361346^2 + 84099^2 .

It is an emirp because it is prime and its reverse (715375346731) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137643573517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137643573547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68821786758 + 68821786759.

It is an arithmetic number, because the mean of its divisors is an integer number (68821786759).

Almost surely, 2^137643573517 is an apocalyptic number.

It is an amenable number.

137643573517 is a deficient number, since it is larger than the sum of its proper divisors (1).

137643573517 is an equidigital number, since it uses as much as digits as its factorization.

137643573517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5556600, while the sum is 52.

The spelling of 137643573517 in words is "one hundred thirty-seven billion, six hundred forty-three million, five hundred seventy-three thousand, five hundred seventeen".