1918171416 has 64 divisors (see below), whose sum is σ = 5508979200. Its totient is φ = 545200128.

The previous prime is 1918171403. The next prime is 1918171439. The reversal of 1918171416 is 6141718191.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2845 + ... + 62003.

It is an arithmetic number, because the mean of its divisors is an integer number (86077800).

Almost surely, 2^1918171416 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 1918171416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2754489600).

1918171416 is an abundant number, since it is smaller than the sum of its proper divisors (3590807784).

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

1918171416 is a wasteful number, since it uses less digits than its factorization.

1918171416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59368 (or 59364 counting only the distinct ones).

The product of its digits is 12096, while the sum is 39.

The square root of 1918171416 is about 43796.9338652833. The cubic root of 1918171416 is about 1242.4983051337.

The spelling of 1918171416 in words is "one billion, nine hundred eighteen million, one hundred seventy-one thousand, four hundred sixteen".