135493686551789 has 2 divisors, whose sum is σ = 135493686551790. Its totient is φ = 135493686551788.

The previous prime is 135493686551693. The next prime is 135493686551933. The reversal of 135493686551789 is 987155686394531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84641527206889 + 50852159344900 = 9200083^2 + 7131070^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135493686551789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135493686554789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67746843275894 + 67746843275895.

It is an arithmetic number, because the mean of its divisors is an integer number (67746843275895).

Almost surely, 2^{135493686551789} is an apocalyptic number.

It is an amenable number.

135493686551789 is a deficient number, since it is larger than the sum of its proper divisors (1).

135493686551789 is an equidigital number, since it uses as much as digits as its factorization.

135493686551789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5878656000, while the sum is 80.

The spelling of 135493686551789 in words is "one hundred thirty-five trillion, four hundred ninety-three billion, six hundred eighty-six million, five hundred fifty-one thousand, seven hundred eighty-nine".