3156481818 has 128 divisors (see below), whose sum is σ = 8473651200. Its totient is φ = 850818816.

The previous prime is 3156481793. The next prime is 3156481819. The reversal of 3156481818 is 8181846513.

3156481818 is a `hidden beast` number, since 3 + 1 + 564 + 8 + 1 + 81 + 8 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3156481819) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2031730 + ... + 2033282.

It is an arithmetic number, because the mean of its divisors is an integer number (66200400).

Almost surely, 2^3156481818 is an apocalyptic number.

3156481818 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3156481818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4236825600).

3156481818 is an abundant number, since it is smaller than the sum of its proper divisors (5317169382).

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

3156481818 is a wasteful number, since it uses less digits than its factorization.

3156481818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1873 (or 1867 counting only the distinct ones).

The product of its digits is 184320, while the sum is 45.

The square root of 3156481818 is about 56182.5757508500. The cubic root of 3156481818 is about 1466.9019886761.

The spelling of 3156481818 in words is "three billion, one hundred fifty-six million, four hundred eighty-one thousand, eight hundred eighteen".