989419858561 has 8 divisors (see below), whose sum is σ = 1024074808064. Its totient is φ = 954936045360.

The previous prime is 989419858529. The next prime is 989419858571. The reversal of 989419858561 is 165858914989.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 989419858561 - 2⁵ = 989419858529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (989419858571) 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, 42772311 + ... + 42795436.

It is an arithmetic number, because the mean of its divisors is an integer number (128009351008).

Almost surely, 2^989419858561 is an apocalyptic number.

It is an amenable number.

989419858561 is a deficient number, since it is larger than the sum of its proper divisors (34654949503).

989419858561 is a wasteful number, since it uses less digits than its factorization.

989419858561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85568151.

The product of its digits is 223948800, while the sum is 73.

The spelling of 989419858561 in words is "nine hundred eighty-nine billion, four hundred nineteen million, eight hundred fifty-eight thousand, five hundred sixty-one".