8149782561 has 32 divisors (see below), whose sum is σ = 11312125440. Its totient is φ = 5215238784.

The previous prime is 8149782539. The next prime is 8149782581. The reversal of 8149782561 is 1652879418.

It is not a de Polignac number, because 8149782561 - 2³⁰ = 7076040737 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8149782521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2889610 + ... + 2892428.

It is an arithmetic number, because the mean of its divisors is an integer number (353503920).

Almost surely, 2^8149782561 is an apocalyptic number.

It is an amenable number.

8149782561 is a deficient number, since it is larger than the sum of its proper divisors (3162342879).

8149782561 is a wasteful number, since it uses less digits than its factorization.

8149782561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3245.

The product of its digits is 967680, while the sum is 51.

The square root of 8149782561 is about 90276.1461350672. The cubic root of 8149782561 is about 2012.4047817095.

The spelling of 8149782561 in words is "eight billion, one hundred forty-nine million, seven hundred eighty-two thousand, five hundred sixty-one".