135456578317 has 2 divisors, whose sum is σ = 135456578318. Its totient is φ = 135456578316.

The previous prime is 135456578293. The next prime is 135456578347. The reversal of 135456578317 is 713875654531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121139498601 + 14317079716 = 348051^2 + 119654^2 .

It is a cyclic number.

It is not a de Polignac number, because 135456578317 - 2¹⁹ = 135456054029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135456578347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67728289158 + 67728289159.

It is an arithmetic number, because the mean of its divisors is an integer number (67728289159).

Almost surely, 2^135456578317 is an apocalyptic number.

It is an amenable number.

135456578317 is a deficient number, since it is larger than the sum of its proper divisors (1).

135456578317 is an equidigital number, since it uses as much as digits as its factorization.

135456578317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10584000, while the sum is 55.

The spelling of 135456578317 in words is "one hundred thirty-five billion, four hundred fifty-six million, five hundred seventy-eight thousand, three hundred seventeen".