136404635186893 has 2 divisors, whose sum is σ = 136404635186894. Its totient is φ = 136404635186892.

The previous prime is 136404635186881. The next prime is 136404635186899. The reversal of 136404635186893 is 398681536404631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136403665923204 + 969263689 = 11679198^2 + 31133^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136404635186893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136404635186899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68202317593446 + 68202317593447.

It is an arithmetic number, because the mean of its divisors is an integer number (68202317593447).

Almost surely, 2^{136404635186893} is an apocalyptic number.

It is an amenable number.

136404635186893 is a deficient number, since it is larger than the sum of its proper divisors (1).

136404635186893 is an equidigital number, since it uses as much as digits as its factorization.

136404635186893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 268738560, while the sum is 67.

The spelling of 136404635186893 in words is "one hundred thirty-six trillion, four hundred four billion, six hundred thirty-five million, one hundred eighty-six thousand, eight hundred ninety-three".