8991289601 has 16 divisors (see below), whose sum is σ = 10810281600. Its totient is φ = 7314937728.

The previous prime is 8991289591. The next prime is 8991289607. The reversal of 8991289601 is 1069821998.

It is not a de Polignac number, because 8991289601 - 2¹⁸ = 8991027457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8991289607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 363380 + ... + 387333.

It is an arithmetic number, because the mean of its divisors is an integer number (675642600).

Almost surely, 2^8991289601 is an apocalyptic number.

It is an amenable number.

8991289601 is a deficient number, since it is larger than the sum of its proper divisors (1818991999).

8991289601 is a wasteful number, since it uses less digits than its factorization.

8991289601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750808.

The product of its (nonzero) digits is 559872, while the sum is 53.

The square root of 8991289601 is about 94822.4108584041. The cubic root of 8991289601 is about 2079.4125560773.

The spelling of 8991289601 in words is "eight billion, nine hundred ninety-one million, two hundred eighty-nine thousand, six hundred one".