89091447985 has 8 divisors (see below), whose sum is σ = 107908894656. Its totient is φ = 70607053680.

The previous prime is 89091447971. The next prime is 89091447997. The reversal of 89091447985 is 58974419098.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-89091447985 is a prime.

It is a super-2 number, since 2×89091447985² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83262501 + ... + 83263570.

It is an arithmetic number, because the mean of its divisors is an integer number (13488611832).

Almost surely, 2^89091447985 is an apocalyptic number.

It is an amenable number.

89091447985 is a deficient number, since it is larger than the sum of its proper divisors (18817446671).

89091447985 is a wasteful number, since it uses less digits than its factorization.

89091447985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166526183.

The product of its (nonzero) digits is 26127360, while the sum is 64.

The spelling of 89091447985 in words is "eighty-nine billion, ninety-one million, four hundred forty-seven thousand, nine hundred eighty-five".