1043663616 has 216 divisors, whose sum is σ = 3288550720. Its totient is φ = 329204736.

The previous prime is 1043663611. The next prime is 1043663627. The reversal of 1043663616 is 6163663401.

1043663616 is a `hidden beast` number, since 1 + 0 + 4 + 3 + 6 + 636 + 16 = 666.

It is a tau number, because it is divible by the number of its divisors (216).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1043663611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1181511 + ... + 1182393.

Almost surely, 2^1043663616 is an apocalyptic number.

1043663616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1043663616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1644275360).

1043663616 is an abundant number, since it is smaller than the sum of its proper divisors (2244887104).

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

1043663616 is an frugal number, since it uses more digits than its factorization.

1043663616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 933 (or 907 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 1043663616 is about 32305.7830117148. The cubic root of 1043663616 is about 1014.3476977150.

The spelling of 1043663616 in words is "one billion, forty-three million, six hundred sixty-three thousand, six hundred sixteen".