136401328781565 has 16 divisors (see below), whose sum is σ = 218850042844800. Its totient is φ = 72544736418752.

The previous prime is 136401328781479. The next prime is 136401328781569. The reversal of 136401328781565 is 565187823104631.

It is a cyclic number.

It is not a de Polignac number, because 136401328781565 - 2²² = 136401324587261 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 136401328781499 and 136401328781508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136401328781569) 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 in 15 ways as a sum of consecutive naturals, for example, 12664927650 + ... + 12664938419.

It is an arithmetic number, because the mean of its divisors is an integer number (13678127677800).

Almost surely, 2^{136401328781565} is an apocalyptic number.

136401328781565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

136401328781565 is a deficient number, since it is larger than the sum of its proper divisors (82448714063235).

136401328781565 is a wasteful number, since it uses less digits than its factorization.

136401328781565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25329866436.

The product of its (nonzero) digits is 29030400, while the sum is 60.

The spelling of 136401328781565 in words is "one hundred thirty-six trillion, four hundred one billion, three hundred twenty-eight million, seven hundred eighty-one thousand, five hundred sixty-five".