89491096128 has 56 divisors (see below), whose sum is σ = 270604032832. Its totient is φ = 25568884224.

The previous prime is 89491096127. The next prime is 89491096147. The reversal of 89491096128 is 82169019498.

It is a tau number, because it is divible by the number of its divisors (56).

It is not an unprimeable number, because it can be changed into a prime (89491096127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33291475 + ... + 33294162.

It is an arithmetic number, because the mean of its divisors is an integer number (4832214872).

Almost surely, 2^89491096128 is an apocalyptic number.

It is an amenable number.

89491096128 is an abundant number, since it is smaller than the sum of its proper divisors (181112936704).

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

89491096128 is a wasteful number, since it uses less digits than its factorization.

89491096128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66585659 (or 66585649 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 57.

The spelling of 89491096128 in words is "eighty-nine billion, four hundred ninety-one million, ninety-six thousand, one hundred twenty-eight".