136801778400643 has 2 divisors, whose sum is σ = 136801778400644. Its totient is φ = 136801778400642.

The previous prime is 136801778400641. The next prime is 136801778400673. The reversal of 136801778400643 is 346004877108631.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 136801778400643 - 2¹ = 136801778400641 is a prime.

Together with 136801778400641, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (136801778400641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68400889200321 + 68400889200322.

It is an arithmetic number, because the mean of its divisors is an integer number (68400889200322).

Almost surely, 2^{136801778400643} is an apocalyptic number.

136801778400643 is a deficient number, since it is larger than the sum of its proper divisors (1).

136801778400643 is an equidigital number, since it uses as much as digits as its factorization.

136801778400643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16257024, while the sum is 58.

The spelling of 136801778400643 in words is "one hundred thirty-six trillion, eight hundred one billion, seven hundred seventy-eight million, four hundred thousand, six hundred forty-three".