3855171656 has 64 divisors (see below), whose sum is σ = 8540052480. Its totient is φ = 1596579840.

The previous prime is 3855171647. The next prime is 3855171659. The reversal of 3855171656 is 6561715583.

It is a self number, because there is not a number n which added to its sum of digits gives 3855171656.

It is not an unprimeable number, because it can be changed into a prime (3855171659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1694936 + ... + 1697208.

It is an arithmetic number, because the mean of its divisors is an integer number (133438320).

Almost surely, 2^3855171656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3855171656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4270026240).

3855171656 is an abundant number, since it is smaller than the sum of its proper divisors (4684880824).

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

3855171656 is a wasteful number, since it uses less digits than its factorization.

3855171656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3294 (or 3290 counting only the distinct ones).

The product of its digits is 756000, while the sum is 47.

The square root of 3855171656 is about 62090.0286358446. The cubic root of 3855171656 is about 1568.0066736232.

The spelling of 3855171656 in words is "three billion, eight hundred fifty-five million, one hundred seventy-one thousand, six hundred fifty-six".