136501987949 has 2 divisors, whose sum is σ = 136501987950. Its totient is φ = 136501987948.

The previous prime is 136501987913. The next prime is 136501987969. The reversal of 136501987949 is 949789105631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124644302500 + 11857685449 = 353050^2 + 108893^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136501987949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 136501987891 and 136501987900.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136501987969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68250993974 + 68250993975.

It is an arithmetic number, because the mean of its divisors is an integer number (68250993975).

Almost surely, 2^136501987949 is an apocalyptic number.

It is an amenable number.

136501987949 is a deficient number, since it is larger than the sum of its proper divisors (1).

136501987949 is an equidigital number, since it uses as much as digits as its factorization.

136501987949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14696640, while the sum is 62.

The spelling of 136501987949 in words is "one hundred thirty-six billion, five hundred one million, nine hundred eighty-seven thousand, nine hundred forty-nine".