8491521152 has 32 divisors (see below), whose sum is σ = 17329315500. Its totient is φ = 4142202880.

The previous prime is 8491521149. The next prime is 8491521197. The reversal of 8491521152 is 2511251948.

It can be written as a sum of positive squares in 2 ways, for example, as 5555615296 + 2935905856 = 74536^2 + 54184^2 .

It is a tau number, because it is divible by the number of its divisors (32).

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 3 ways as a sum of consecutive naturals, for example, 803777 + ... + 814272.

Almost surely, 2^8491521152 is an apocalyptic number.

8491521152 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

It is an amenable number.

8491521152 is an abundant number, since it is smaller than the sum of its proper divisors (8837794348).

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

8491521152 is a wasteful number, since it uses less digits than its factorization.

8491521152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618104 (or 1618092 counting only the distinct ones).

The product of its digits is 28800, while the sum is 38.

The square root of 8491521152 is about 92149.4500906001. The cubic root of 8491521152 is about 2040.1487421982.

The spelling of 8491521152 in words is "eight billion, four hundred ninety-one million, five hundred twenty-one thousand, one hundred fifty-two".