8611521646 has 64 divisors (see below), whose sum is σ = 16433948160. Its totient is φ = 3293861760.

The previous prime is 8611521641. The next prime is 8611521671. The reversal of 8611521646 is 6461251168.

It is a junction number, because it is equal to n+sod(n) for n = 8611521599 and 8611521608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8611521641) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 648445 + ... + 661591.

It is an arithmetic number, because the mean of its divisors is an integer number (256780440).

Almost surely, 2^8611521646 is an apocalyptic number.

8611521646 is a deficient number, since it is larger than the sum of its proper divisors (7822426514).

8611521646 is a wasteful number, since it uses less digits than its factorization.

8611521646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13289.

The product of its digits is 69120, while the sum is 40.

The square root of 8611521646 is about 92798.2847147511. The cubic root of 8611521646 is about 2049.7141497922.

The spelling of 8611521646 in words is "eight billion, six hundred eleven million, five hundred twenty-one thousand, six hundred forty-six".