135784280861 has 2 divisors, whose sum is σ = 135784280862. Its totient is φ = 135784280860.

The previous prime is 135784280803. The next prime is 135784280899. The reversal of 135784280861 is 168082487531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85318904836 + 50465376025 = 292094^2 + 224645^2 .

It is a cyclic number.

It is not a de Polignac number, because 135784280861 - 2¹⁸ = 135784018717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135784280461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67892140430 + 67892140431.

It is an arithmetic number, because the mean of its divisors is an integer number (67892140431).

Almost surely, 2^135784280861 is an apocalyptic number.

It is an amenable number.

135784280861 is a deficient number, since it is larger than the sum of its proper divisors (1).

135784280861 is an equidigital number, since it uses as much as digits as its factorization.

135784280861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2580480, while the sum is 53.

The spelling of 135784280861 in words is "one hundred thirty-five billion, seven hundred eighty-four million, two hundred eighty thousand, eight hundred sixty-one".