136877786957 has 2 divisors, whose sum is σ = 136877786958. Its totient is φ = 136877786956.

The previous prime is 136877786873. The next prime is 136877786963. The reversal of 136877786957 is 759687778631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136117461481 + 760325476 = 368941^2 + 27574^2 .

It is an emirp because it is prime and its reverse (759687778631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136877786957 - 2¹⁴ = 136877770573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136877786987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68438893478 + 68438893479.

It is an arithmetic number, because the mean of its divisors is an integer number (68438893479).

Almost surely, 2^136877786957 is an apocalyptic number.

It is an amenable number.

136877786957 is a deficient number, since it is larger than the sum of its proper divisors (1).

136877786957 is an equidigital number, since it uses as much as digits as its factorization.

136877786957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 746807040, while the sum is 74.

The spelling of 136877786957 in words is "one hundred thirty-six billion, eight hundred seventy-seven million, seven hundred eighty-six thousand, nine hundred fifty-seven".