1009543816 has 32 divisors (see below), whose sum is σ = 1949400000. Its totient is φ = 489779136.

The previous prime is 1009543789. The next prime is 1009543849. The reversal of 1009543816 is 6183459001.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107685 + ... + 116683.

It is an arithmetic number, because the mean of its divisors is an integer number (60918750).

Almost surely, 2^1009543816 is an apocalyptic number.

It is an amenable number.

1009543816 is a deficient number, since it is larger than the sum of its proper divisors (939856184).

1009543816 is a wasteful number, since it uses less digits than its factorization.

1009543816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9421 (or 9417 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 1009543816 is about 31773.3192474441. The cubic root of 1009543816 is about 1003.1712048295.

The spelling of 1009543816 in words is "one billion, nine million, five hundred forty-three thousand, eight hundred sixteen".