136648136257 has 2 divisors, whose sum is σ = 136648136258. Its totient is φ = 136648136256.

The previous prime is 136648136231. The next prime is 136648136267. The reversal of 136648136257 is 752631846631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133520083216 + 3128053041 = 365404^2 + 55929^2 .

It is a cyclic number.

It is not a de Polignac number, because 136648136257 - 2¹⁵ = 136648103489 is a prime.

It is not a weakly prime, because it can be changed into another prime (136648136267) 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, 68324068128 + 68324068129.

It is an arithmetic number, because the mean of its divisors is an integer number (68324068129).

Almost surely, 2^136648136257 is an apocalyptic number.

It is an amenable number.

136648136257 is a deficient number, since it is larger than the sum of its proper divisors (1).

136648136257 is an equidigital number, since it uses as much as digits as its factorization.

136648136257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4354560, while the sum is 52.

The spelling of 136648136257 in words is "one hundred thirty-six billion, six hundred forty-eight million, one hundred thirty-six thousand, two hundred fifty-seven".