135656664538877 has 2 divisors, whose sum is σ = 135656664538878. Its totient is φ = 135656664538876.

The previous prime is 135656664538859. The next prime is 135656664538931. The reversal of 135656664538877 is 778835466656531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99957724468996 + 35698940069881 = 9997886^2 + 5974859^2 .

It is a cyclic number.

It is not a de Polignac number, because 135656664538877 - 2⁸ = 135656664538621 is a prime.

It is a super-2 number, since 2×135656664538877² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135656664535877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67828332269438 + 67828332269439.

It is an arithmetic number, because the mean of its divisors is an integer number (67828332269439).

Almost surely, 2^{135656664538877} is an apocalyptic number.

It is an amenable number.

135656664538877 is a deficient number, since it is larger than the sum of its proper divisors (1).

135656664538877 is an equidigital number, since it uses as much as digits as its factorization.

135656664538877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18289152000, while the sum is 80.

The spelling of 135656664538877 in words is "one hundred thirty-five trillion, six hundred fifty-six billion, six hundred sixty-four million, five hundred thirty-eight thousand, eight hundred seventy-seven".