89897086640 has 80 divisors (see below), whose sum is σ = 221393865600. Its totient is φ = 33830092800.

The previous prime is 89897086621. The next prime is 89897086673. The reversal of 89897086640 is 4668079898.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3797561 + ... + 3821159.

It is an arithmetic number, because the mean of its divisors is an integer number (2767423320).

Almost surely, 2^89897086640 is an apocalyptic number.

89897086640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 89897086640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110696932800).

89897086640 is an abundant number, since it is smaller than the sum of its proper divisors (131496778960).

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

89897086640 is a wasteful number, since it uses less digits than its factorization.

89897086640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26430 (or 26424 counting only the distinct ones).

The product of its (nonzero) digits is 41803776, while the sum is 65.

The spelling of 89897086640 in words is "eighty-nine billion, eight hundred ninety-seven million, eighty-six thousand, six hundred forty".