3888888888845 has 4 divisors (see below), whose sum is σ = 4666666666620. Its totient is φ = 3111111111072.

The previous prime is 3888888888839. The next prime is 3888888888883. The reversal of 3888888888845 is 5488888888883.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1883750760004 + 2005138128841 = 1372498^2 + 1416029^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3888888888845 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 388888888880 + ... + 388888888889.

It is an arithmetic number, because the mean of its divisors is an integer number (1166666666655).

Almost surely, 2^{3888888888845} is an apocalyptic number.

It is an amenable number.

3888888888845 is a deficient number, since it is larger than the sum of its proper divisors (777777777775).

3888888888845 is an equidigital number, since it uses as much as digits as its factorization.

3888888888845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777777777774.

The product of its digits is 64424509440, while the sum is 92.

The spelling of 3888888888845 in words is "three trillion, eight hundred eighty-eight billion, eight hundred eighty-eight million, eight hundred eighty-eight thousand, eight hundred forty-five".