3918216945 has 32 divisors (see below), whose sum is σ = 6492294144. Its totient is φ = 2015769600.

The previous prime is 3918216931. The next prime is 3918217013. The reversal of 3918216945 is 5496128193.

It is not a de Polignac number, because 3918216945 - 2¹⁰ = 3918215921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3918216894 and 3918216903.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 132085 + ... + 159005.

It is an arithmetic number, because the mean of its divisors is an integer number (202884192).

Almost surely, 2^3918216945 is an apocalyptic number.

It is an amenable number.

3918216945 is a deficient number, since it is larger than the sum of its proper divisors (2574077199).

3918216945 is a wasteful number, since it uses less digits than its factorization.

3918216945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27273.

The product of its digits is 466560, while the sum is 48.

The square root of 3918216945 is about 62595.6623497188. The cubic root of 3918216945 is about 1576.5079294699.

The spelling of 3918216945 in words is "three billion, nine hundred eighteen million, two hundred sixteen thousand, nine hundred forty-five".