136385668443877 has 2 divisors, whose sum is σ = 136385668443878. Its totient is φ = 136385668443876.

The previous prime is 136385668443853. The next prime is 136385668443883. The reversal of 136385668443877 is 778344866583631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99943028116801 + 36442640327076 = 9997151^2 + 6036774^2 .

It is an emirp because it is prime and its reverse (778344866583631) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136385668443877 is a prime.

It is a super-2 number, since 2×136385668443877² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 136385668443797 and 136385668443806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136385668443077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68192834221938 + 68192834221939.

It is an arithmetic number, because the mean of its divisors is an integer number (68192834221939).

Almost surely, 2^{136385668443877} is an apocalyptic number.

It is an amenable number.

136385668443877 is a deficient number, since it is larger than the sum of its proper divisors (1).

136385668443877 is an equidigital number, since it uses as much as digits as its factorization.

136385668443877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11705057280, while the sum is 79.

The spelling of 136385668443877 in words is "one hundred thirty-six trillion, three hundred eighty-five billion, six hundred sixty-eight million, four hundred forty-three thousand, eight hundred seventy-seven".