1618181214 has 64 divisors (see below), whose sum is σ = 3615080448. Its totient is φ = 479520000.

The previous prime is 1618181177. The next prime is 1618181219. The reversal of 1618181214 is 4121818161.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1618181219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 537714 + ... + 540714.

It is an arithmetic number, because the mean of its divisors is an integer number (56485632).

Almost surely, 2^1618181214 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1618181214, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1807540224).

1618181214 is an abundant number, since it is smaller than the sum of its proper divisors (1996899234).

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

1618181214 is a wasteful number, since it uses less digits than its factorization.

1618181214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3273.

The product of its digits is 3072, while the sum is 33.

The square root of 1618181214 is about 40226.6231990705. The cubic root of 1618181214 is about 1174.0206026720.

Adding to 1618181214 its reverse (4121818161), we get a palindrome (5739999375).

The spelling of 1618181214 in words is "one billion, six hundred eighteen million, one hundred eighty-one thousand, two hundred fourteen".