1943763816 has 64 divisors (see below), whose sum is σ = 5154468480. Its totient is φ = 608716800.

The previous prime is 1943763763. The next prime is 1943763823. The reversal of 1943763816 is 6183673491.

It is a happy 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, 241245 + ... + 249171.

It is an arithmetic number, because the mean of its divisors is an integer number (80538570).

Almost surely, 2^1943763816 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 1943763816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2577234240).

1943763816 is an abundant number, since it is smaller than the sum of its proper divisors (3210704664).

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

1943763816 is a wasteful number, since it uses less digits than its factorization.

1943763816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8554 (or 8550 counting only the distinct ones).

The product of its digits is 653184, while the sum is 48.

The square root of 1943763816 is about 44088.1369077896. The cubic root of 1943763816 is about 1247.9997483152. Note that the first 3 decimals are identical.

The spelling of 1943763816 in words is "one billion, nine hundred forty-three million, seven hundred sixty-three thousand, eight hundred sixteen".