3818121466385 has 8 divisors (see below), whose sum is σ = 4582093546536. Its totient is φ = 3054265315200.

The previous prime is 3818121466373. The next prime is 3818121466399. The reversal of 3818121466385 is 5836641218183.

It can be written as a sum of positive squares in 4 ways, for example, as 829257924496 + 2988863541889 = 910636^2 + 1728833^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3818121466385 - 2¹⁴ = 3818121450001 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3818121466385.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28909766 + ... + 29041535.

It is an arithmetic number, because the mean of its divisors is an integer number (572761693317).

Almost surely, 2^{3818121466385} is an apocalyptic number.

It is an amenable number.

3818121466385 is a deficient number, since it is larger than the sum of its proper divisors (763972080151).

3818121466385 is a wasteful number, since it uses less digits than its factorization.

3818121466385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57964483.

The product of its digits is 6635520, while the sum is 56.

The spelling of 3818121466385 in words is "three trillion, eight hundred eighteen billion, one hundred twenty-one million, four hundred sixty-six thousand, three hundred eighty-five".