8611521658 has 16 divisors (see below), whose sum is σ = 13800085920. Its totient is φ = 4018257936.

The previous prime is 8611521641. The next prime is 8611521671. The reversal of 8611521658 is 8561251168.

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 7 ways as a sum of consecutive naturals, for example, 1688641 + ... + 1693732.

It is an arithmetic number, because the mean of its divisors is an integer number (862505370).

Almost surely, 2^8611521658 is an apocalyptic number.

8611521658 is a deficient number, since it is larger than the sum of its proper divisors (5188564262).

8611521658 is a wasteful number, since it uses less digits than its factorization.

8611521658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3382461.

The product of its digits is 115200, while the sum is 43.

The square root of 8611521658 is about 92798.2847794074. The cubic root of 8611521658 is about 2049.7141507442.

The spelling of 8611521658 in words is "eight billion, six hundred eleven million, five hundred twenty-one thousand, six hundred fifty-eight".