67540509551297 has 2 divisors, whose sum is σ = 67540509551298. Its totient is φ = 67540509551296.

The previous prime is 67540509551287. The next prime is 67540509551327. The reversal of 67540509551297 is 79215590504576.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49100347322896 + 18440162228401 = 7007164^2 + 4294201^2 .

It is a cyclic number.

It is not a de Polignac number, because 67540509551297 - 2²⁰ = 67540508502721 is a prime.

It is not a weakly prime, because it can be changed into another prime (67540509551227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33770254775648 + 33770254775649.

It is an arithmetic number, because the mean of its divisors is an integer number (33770254775649).

Almost surely, 2^{67540509551297} is an apocalyptic number.

It is an amenable number.

67540509551297 is a deficient number, since it is larger than the sum of its proper divisors (1).

67540509551297 is an equidigital number, since it uses as much as digits as its factorization.

67540509551297 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 119070000, while the sum is 65.

The spelling of 67540509551297 in words is "sixty-seven trillion, five hundred forty billion, five hundred nine million, five hundred fifty-one thousand, two hundred ninety-seven".