89681609681 has 8 divisors (see below), whose sum is σ = 92585259264. Its totient is φ = 86778628560.

The previous prime is 89681609587. The next prime is 89681609701. The reversal of 89681609681 is 18690618698.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89681609681 is a prime.

It is a super-2 number, since 2×89681609681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89681659681) 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 7 ways as a sum of consecutive naturals, for example, 113030 + ... + 438336.

It is an arithmetic number, because the mean of its divisors is an integer number (11573157408).

Almost surely, 2^89681609681 is an apocalyptic number.

It is an amenable number.

89681609681 is a deficient number, since it is larger than the sum of its proper divisors (2903649583).

89681609681 is a wasteful number, since it uses less digits than its factorization.

89681609681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334231.

The product of its (nonzero) digits is 8957952, while the sum is 62.

The spelling of 89681609681 in words is "eighty-nine billion, six hundred eighty-one million, six hundred nine thousand, six hundred eighty-one".