8029491561 has 192 divisors, whose sum is σ = 16102195200. Its totient is φ = 3730987008.

The previous prime is 8029491529. The next prime is 8029491563. The reversal of 8029491561 is 1651949208.

8029491561 is a `hidden beast` number, since 80 + 2 + 9 + 4 + 9 + 1 + 561 = 666.

It is not a de Polignac number, because 8029491561 - 2⁵ = 8029491529 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8029491563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 33596080 + ... + 33596318.

It is an arithmetic number, because the mean of its divisors is an integer number (83865600).

Almost surely, 2^8029491561 is an apocalyptic number.

It is an amenable number.

8029491561 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

8029491561 is a wasteful number, since it uses less digits than its factorization.

8029491561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428 (or 425 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The square root of 8029491561 is about 89607.4302778514. The cubic root of 8029491561 is about 2002.4546162803.

The spelling of 8029491561 in words is "eight billion, twenty-nine million, four hundred ninety-one thousand, five hundred sixty-one".