13764641218385 has 16 divisors (see below), whose sum is σ = 16545530444112. Its totient is φ = 10993074892800.

The previous prime is 13764641218369. The next prime is 13764641218417. The reversal of 13764641218385 is 58381214646731.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 899191338049 + 12865449880336 = 948257^2 + 3586844^2 .

It is not a de Polignac number, because 13764641218385 - 2⁴ = 13764641218369 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44767475 + ... + 45073895.

It is an arithmetic number, because the mean of its divisors is an integer number (1034095652757).

Almost surely, 2^{13764641218385} is an apocalyptic number.

It is an amenable number.

13764641218385 is a deficient number, since it is larger than the sum of its proper divisors (2780889225727).

13764641218385 is a wasteful number, since it uses less digits than its factorization.

13764641218385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321604.

The product of its digits is 23224320, while the sum is 59.

The spelling of 13764641218385 in words is "thirteen trillion, seven hundred sixty-four billion, six hundred forty-one million, two hundred eighteen thousand, three hundred eighty-five".