3855218601630 has 128 divisors (see below), whose sum is σ = 10482356551680. Its totient is φ = 898859171840.

The previous prime is 3855218601589. The next prime is 3855218601709. The reversal of 3855218601630 is 361068125583.

It is a self number, because there is not a number n which added to its sum of digits gives 3855218601630.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1675747 + ... + 3243233.

It is an arithmetic number, because the mean of its divisors is an integer number (81893410560).

Almost surely, 2^{3855218601630} is an apocalyptic number.

3855218601630 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3855218601630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5241178275840).

3855218601630 is an abundant number, since it is smaller than the sum of its proper divisors (6627137950050).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3855218601630 is a wasteful number, since it uses less digits than its factorization.

3855218601630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1567794.

The product of its (nonzero) digits is 1036800, while the sum is 48.

The spelling of 3855218601630 in words is "three trillion, eight hundred fifty-five billion, two hundred eighteen million, six hundred one thousand, six hundred thirty".