1143647616 has 64 divisors (see below), whose sum is σ = 3102497280. Its totient is φ = 373099008.

The previous prime is 1143647611. The next prime is 1143647633. The reversal of 1143647616 is 6167463411.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143647611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13636 + ... + 49731.

It is an arithmetic number, because the mean of its divisors is an integer number (48476520).

Almost surely, 2^1143647616 is an apocalyptic number.

1143647616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1143647616 is an abundant number, since it is smaller than the sum of its proper divisors (1958849664).

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

1143647616 is an equidigital number, since it uses as much as digits as its factorization.

1143647616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63431 (or 63419 counting only the distinct ones).

The product of its digits is 72576, while the sum is 39.

The square root of 1143647616 is about 33817.8594236832. The cubic root of 1143647616 is about 1045.7569101697.

The spelling of 1143647616 in words is "one billion, one hundred forty-three million, six hundred forty-seven thousand, six hundred sixteen".