8991756484 has 48 divisors (see below), whose sum is σ = 16964757936. Its totient is φ = 4154572800.

The previous prime is 8991756461. The next prime is 8991756503. The reversal of 8991756484 is 4846571998.

It can be written as a sum of positive squares in 8 ways, for example, as 87946884 + 8903809600 = 9378^2 + 94360^2 .

It is a Harshad number since it is a multiple of its sum of digits (61).

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, 2789994 + ... + 2793214.

It is an arithmetic number, because the mean of its divisors is an integer number (353432457).

Almost surely, 2^8991756484 is an apocalyptic number.

It is an amenable number.

8991756484 is a deficient number, since it is larger than the sum of its proper divisors (7973001452).

8991756484 is a wasteful number, since it uses less digits than its factorization.

8991756484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3976 (or 3974 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 61.

The square root of 8991756484 is about 94824.8727075339. The cubic root of 8991756484 is about 2079.4485474131.

The spelling of 8991756484 in words is "eight billion, nine hundred ninety-one million, seven hundred fifty-six thousand, four hundred eighty-four".