8391756416 has 16 divisors (see below), whose sum is σ = 16717952490. Its totient is φ = 4195878144.

The previous prime is 8391756413. The next prime is 8391756449. The reversal of 8391756416 is 6146571938.

It can be written as a sum of positive squares in only one way, i.e., 6077761600 + 2313994816 = 77960^2 + 48104^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (8391756413) 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 as a sum of consecutive naturals, namely, 32780171 + ... + 32780426.

Almost surely, 2^8391756416 is an apocalyptic number.

It is an amenable number.

8391756416 is a deficient number, since it is larger than the sum of its proper divisors (8326196074).

8391756416 is an equidigital number, since it uses as much as digits as its factorization.

8391756416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65560611 (or 65560599 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 50.

The square root of 8391756416 is about 91606.5304222357. The cubic root of 8391756416 is about 2032.1275159194.

The spelling of 8391756416 in words is "eight billion, three hundred ninety-one million, seven hundred fifty-six thousand, four hundred sixteen".