89644966521 has 32 divisors (see below), whose sum is σ = 134303367168. Its totient is φ = 52709307840.

The previous prime is 89644966519. The next prime is 89644966553. The reversal of 89644966521 is 12566944698.

It is not a de Polignac number, because 89644966521 - 2¹ = 89644966519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (89644966501) 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 31 ways as a sum of consecutive naturals, for example, 317896 + ... + 529478.

It is an arithmetic number, because the mean of its divisors is an integer number (4196980224).

Almost surely, 2^89644966521 is an apocalyptic number.

It is an amenable number.

89644966521 is a deficient number, since it is larger than the sum of its proper divisors (44658400647).

89644966521 is a wasteful number, since it uses less digits than its factorization.

89644966521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211981.

The product of its digits is 22394880, while the sum is 60.

The spelling of 89644966521 in words is "eighty-nine billion, six hundred forty-four million, nine hundred sixty-six thousand, five hundred twenty-one".