540768642173 has 2 divisors, whose sum is σ = 540768642174. Its totient is φ = 540768642172.

The previous prime is 540768642149. The next prime is 540768642181. The reversal of 540768642173 is 371246867045.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 507324279289 + 33444362884 = 712267^2 + 182878^2 .

It is a cyclic number.

It is not a de Polignac number, because 540768642173 - 2⁶ = 540768642109 is a prime.

It is a super-2 number, since 2×540768642173² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (540768642103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270384321086 + 270384321087.

It is an arithmetic number, because the mean of its divisors is an integer number (270384321087).

Almost surely, 2^540768642173 is an apocalyptic number.

It is an amenable number.

540768642173 is a deficient number, since it is larger than the sum of its proper divisors (1).

540768642173 is an equidigital number, since it uses as much as digits as its factorization.

540768642173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6773760, while the sum is 53.

The spelling of 540768642173 in words is "five hundred forty billion, seven hundred sixty-eight million, six hundred forty-two thousand, one hundred seventy-three".