89785804561 has 8 divisors (see below), whose sum is σ = 90036403520. Its totient is φ = 89535278448.

The previous prime is 89785804543. The next prime is 89785804609. The reversal of 89785804561 is 16540858798.

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

It is a cyclic number.

It is not a de Polignac number, because 89785804561 - 2⁵ = 89785804529 is a prime.

It is a super-2 number, since 2×89785804561² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 89785804561.

It is not an unprimeable number, because it can be changed into a prime (89785804531) by changing a digit.

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, 3263515 + ... + 3290911.

It is an arithmetic number, because the mean of its divisors is an integer number (11254550440).

Almost surely, 2^89785804561 is an apocalyptic number.

It is an amenable number.

89785804561 is a deficient number, since it is larger than the sum of its proper divisors (250598959).

89785804561 is a wasteful number, since it uses less digits than its factorization.

89785804561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36423.

The product of its (nonzero) digits is 19353600, while the sum is 61.

The spelling of 89785804561 in words is "eighty-nine billion, seven hundred eighty-five million, eight hundred four thousand, five hundred sixty-one".