136404635186987 has 2 divisors, whose sum is σ = 136404635186988. Its totient is φ = 136404635186986.

The previous prime is 136404635186927. The next prime is 136404635187091. The reversal of 136404635186987 is 789681536404631.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 136404635186987 - 2⁸ = 136404635186731 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 136404635186987.

It is not a weakly prime, because it can be changed into another prime (136404635186927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68202317593493 + 68202317593494.

It is an arithmetic number, because the mean of its divisors is an integer number (68202317593494).

Almost surely, 2^{136404635186987} is an apocalyptic number.

136404635186987 is a deficient number, since it is larger than the sum of its proper divisors (1).

136404635186987 is an equidigital number, since it uses as much as digits as its factorization.

136404635186987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 627056640, while the sum is 71.

The spelling of 136404635186987 in words is "one hundred thirty-six trillion, four hundred four billion, six hundred thirty-five million, one hundred eighty-six thousand, nine hundred eighty-seven".