673541561137 has 2 divisors, whose sum is σ = 673541561138. Its totient is φ = 673541561136.

The previous prime is 673541561083. The next prime is 673541561141. The reversal of 673541561137 is 731165145376.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 461307206416 + 212234354721 = 679196^2 + 460689^2 .

It is a cyclic number.

It is not a de Polignac number, because 673541561137 - 2¹⁵ = 673541528369 is a prime.

It is not a weakly prime, because it can be changed into another prime (673541541137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336770780568 + 336770780569.

It is an arithmetic number, because the mean of its divisors is an integer number (336770780569).

Almost surely, 2^673541561137 is an apocalyptic number.

It is an amenable number.

673541561137 is a deficient number, since it is larger than the sum of its proper divisors (1).

673541561137 is an equidigital number, since it uses as much as digits as its factorization.

673541561137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1587600, while the sum is 49.

The spelling of 673541561137 in words is "six hundred seventy-three billion, five hundred forty-one million, five hundred sixty-one thousand, one hundred thirty-seven".