3855561894 has 12 divisors (see below), whose sum is σ = 8353717476. Its totient is φ = 1285187292.

The previous prime is 3855561889. The next prime is 3855561901. The reversal of 3855561894 is 4981655583.

3855561894 is a `hidden beast` number, since 3 + 8 + 5 + 556 + 1 + 89 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 3855561894.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 107098924 + ... + 107098959.

It is an arithmetic number, because the mean of its divisors is an integer number (696143123).

Almost surely, 2^3855561894 is an apocalyptic number.

3855561894 is an abundant number, since it is smaller than the sum of its proper divisors (4498155582).

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

3855561894 is a wasteful number, since it uses less digits than its factorization.

3855561894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214197891 (or 214197888 counting only the distinct ones).

The product of its digits is 5184000, while the sum is 54.

The square root of 3855561894 is about 62093.1710737984. The cubic root of 3855561894 is about 1568.0595787593.

The spelling of 3855561894 in words is "three billion, eight hundred fifty-five million, five hundred sixty-one thousand, eight hundred ninety-four".