135617712281 has 2 divisors, whose sum is σ = 135617712282. Its totient is φ = 135617712280.

The previous prime is 135617712247. The next prime is 135617712283. The reversal of 135617712281 is 182217716531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133707235600 + 1910476681 = 365660^2 + 43709^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135617712281 is a prime.

It is a super-2 number, since 2×135617712281² (a number of 23 digits) contains 22 as substring.

Together with 135617712283, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (135617712283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67808856140 + 67808856141.

It is an arithmetic number, because the mean of its divisors is an integer number (67808856141).

Almost surely, 2^135617712281 is an apocalyptic number.

It is an amenable number.

135617712281 is a deficient number, since it is larger than the sum of its proper divisors (1).

135617712281 is an equidigital number, since it uses as much as digits as its factorization.

135617712281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 44.

The spelling of 135617712281 in words is "one hundred thirty-five billion, six hundred seventeen million, seven hundred twelve thousand, two hundred eighty-one".