135664656431 has 2 divisors, whose sum is σ = 135664656432. Its totient is φ = 135664656430.

The previous prime is 135664656403. The next prime is 135664656481. The reversal of 135664656431 is 134656466531.

It is an a-pointer prime, because the next prime (135664656481) can be obtained adding 135664656431 to its sum of digits (50).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135664656431 is a prime.

It is a super-2 number, since 2×135664656431² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 135664656431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135664656481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67832328215 + 67832328216.

It is an arithmetic number, because the mean of its divisors is an integer number (67832328216).

Almost surely, 2^135664656431 is an apocalyptic number.

135664656431 is a deficient number, since it is larger than the sum of its proper divisors (1).

135664656431 is an equidigital number, since it uses as much as digits as its factorization.

135664656431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4665600, while the sum is 50.

The spelling of 135664656431 in words is "one hundred thirty-five billion, six hundred sixty-four million, six hundred fifty-six thousand, four hundred thirty-one".