3855383128863 has 24 divisors (see below), whose sum is σ = 6365087778816. Its totient is φ = 2202852531600.

The previous prime is 3855383128829. The next prime is 3855383128931. The reversal of 3855383128863 is 3688213835583.

It is a happy number.

3855383128863 is a `hidden beast` number, since 3 + 8 + 5 + 538 + 3 + 12 + 8 + 86 + 3 = 666.

It is not a de Polignac number, because 3855383128863 - 2⁶ = 3855383128799 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 3855383128863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3855383128463) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2477943 + ... + 3721688.

It is an arithmetic number, because the mean of its divisors is an integer number (265211990784).

Almost surely, 2^{3855383128863} is an apocalyptic number.

3855383128863 is a deficient number, since it is larger than the sum of its proper divisors (2509704649953).

3855383128863 is a wasteful number, since it uses less digits than its factorization.

3855383128863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6209515 (or 6209512 counting only the distinct ones).

The product of its digits is 99532800, while the sum is 63.

The spelling of 3855383128863 in words is "three trillion, eight hundred fifty-five billion, three hundred eighty-three million, one hundred twenty-eight thousand, eight hundred sixty-three".