1618166396 has 162 divisors, whose sum is σ = 3794078232. Its totient is φ = 601524000.

The previous prime is 1618166383. The next prime is 1618166419. The reversal of 1618166396 is 6936618161.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1618166396.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 22791041 + ... + 22791111.

It is an arithmetic number, because the mean of its divisors is an integer number (23420236).

Almost surely, 2^1618166396 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1618166396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1897039116).

1618166396 is an abundant number, since it is smaller than the sum of its proper divisors (2175911836).

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

1618166396 is a wasteful number, since it uses less digits than its factorization.

1618166396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173 (or 122 counting only the distinct ones).

The product of its digits is 279936, while the sum is 47.

The square root of 1618166396 is about 40226.4390171439. The cubic root of 1618166396 is about 1174.0170190827.

The spelling of 1618166396 in words is "one billion, six hundred eighteen million, one hundred sixty-six thousand, three hundred ninety-six".