136855280987 has 2 divisors, whose sum is σ = 136855280988. Its totient is φ = 136855280986.

The previous prime is 136855280977. The next prime is 136855281011. The reversal of 136855280987 is 789082558631.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 136855280987 - 2⁴ = 136855280971 is a prime.

It is not a weakly prime, because it can be changed into another prime (136855280917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68427640493 + 68427640494.

It is an arithmetic number, because the mean of its divisors is an integer number (68427640494).

Almost surely, 2^136855280987 is an apocalyptic number.

136855280987 is a deficient number, since it is larger than the sum of its proper divisors (1).

136855280987 is an equidigital number, since it uses as much as digits as its factorization.

136855280987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29030400, while the sum is 62.

The spelling of 136855280987 in words is "one hundred thirty-six billion, eight hundred fifty-five million, two hundred eighty thousand, nine hundred eighty-seven".