89009448561 has 112 divisors (see below), whose sum is σ = 153649218240. Its totient is φ = 50972146560.

The previous prime is 89009448553. The next prime is 89009448587. The reversal of 89009448561 is 16584490098.

It is not a de Polignac number, because 89009448561 - 2³ = 89009448553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 89009448498 and 89009448507.

It is not an unprimeable number, because it can be changed into a prime (89009440561) 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 111 ways as a sum of consecutive naturals, for example, 111680215 + ... + 111681011.

It is an arithmetic number, because the mean of its divisors is an integer number (1371868020).

Almost surely, 2^89009448561 is an apocalyptic number.

89009448561 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

89009448561 is a deficient number, since it is larger than the sum of its proper divisors (64639769679).

89009448561 is a wasteful number, since it uses less digits than its factorization.

89009448561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578 (or 1563 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 54.

The spelling of 89009448561 in words is "eighty-nine billion, nine million, four hundred forty-eight thousand, five hundred sixty-one".