136640824549 has 2 divisors, whose sum is σ = 136640824550. Its totient is φ = 136640824548.

The previous prime is 136640824543. The next prime is 136640824553. The reversal of 136640824549 is 945428046631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131927315524 + 4713509025 = 363218^2 + 68655^2 .

It is a cyclic number.

It is not a de Polignac number, because 136640824549 - 2¹⁷ = 136640693477 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 136640824496 and 136640824505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136640824543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68320412274 + 68320412275.

It is an arithmetic number, because the mean of its divisors is an integer number (68320412275).

Almost surely, 2^136640824549 is an apocalyptic number.

It is an amenable number.

136640824549 is a deficient number, since it is larger than the sum of its proper divisors (1).

136640824549 is an equidigital number, since it uses as much as digits as its factorization.

136640824549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4976640, while the sum is 52.

The spelling of 136640824549 in words is "one hundred thirty-six billion, six hundred forty million, eight hundred twenty-four thousand, five hundred forty-nine".