989426888664 has 32 divisors (see below), whose sum is σ = 2474918269440. Its totient is φ = 329628823200.

The previous prime is 989426888641. The next prime is 989426888819. The reversal of 989426888664 is 466888624989.

It is a super-2 number, since 2×989426888664² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 989426888664.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11213872 + ... + 11301759.

It is an arithmetic number, because the mean of its divisors is an integer number (77341195920).

Almost surely, 2^989426888664 is an apocalyptic number.

It is an amenable number.

989426888664 is an abundant number, since it is smaller than the sum of its proper divisors (1485491380776).

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

989426888664 is a wasteful number, since it uses less digits than its factorization.

989426888664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22517471 (or 22517467 counting only the distinct ones).

The product of its digits is 2293235712, while the sum is 78.

The spelling of 989426888664 in words is "nine hundred eighty-nine billion, four hundred twenty-six million, eight hundred eighty-eight thousand, six hundred sixty-four".