89661529872 has 120 divisors (see below), whose sum is σ = 264898476960. Its totient is φ = 28232271360.

The previous prime is 89661529871. The next prime is 89661529883. The reversal of 89661529872 is 27892516698.

89661529872 is a `hidden beast` number, since 8 + 9 + 6 + 615 + 2 + 9 + 8 + 7 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (89661529871) 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 23 ways as a sum of consecutive naturals, for example, 902172 + ... + 996612.

It is an arithmetic number, because the mean of its divisors is an integer number (2207487308).

Almost surely, 2^89661529872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 89661529872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132449238480).

89661529872 is an abundant number, since it is smaller than the sum of its proper divisors (175236947088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

89661529872 is a wasteful number, since it uses less digits than its factorization.

89661529872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94821 (or 94812 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 63.

The spelling of 89661529872 in words is "eighty-nine billion, six hundred sixty-one million, five hundred twenty-nine thousand, eight hundred seventy-two".