3945554118 has 32 divisors (see below), whose sum is σ = 9564981120. Its totient is φ = 1195622280.

The previous prime is 3945554111. The next prime is 3945554147. The reversal of 3945554118 is 8114555493.

It is a happy number.

3945554118 is a `hidden beast` number, since 3 + 94 + 5 + 5 + 541 + 18 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3945554111) 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, 3320580 + ... + 3321767.

It is an arithmetic number, because the mean of its divisors is an integer number (298905660).

Almost surely, 2^3945554118 is an apocalyptic number.

3945554118 is an abundant number, since it is smaller than the sum of its proper divisors (5619427002).

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

3945554118 is a wasteful number, since it uses less digits than its factorization.

3945554118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6642369 (or 6642363 counting only the distinct ones).

The product of its digits is 432000, while the sum is 45.

The square root of 3945554118 is about 62813.6459537257. The cubic root of 3945554118 is about 1580.1658371570.

The spelling of 3945554118 in words is "three billion, nine hundred forty-five million, five hundred fifty-four thousand, one hundred eighteen".