989569342441 has 9 divisors (see below), whose sum is σ = 1003384414071. Its totient is φ = 975941974512.

The previous prime is 989569342409. The next prime is 989569342469. The reversal of 989569342441 is 144243965989.

The square root of 989569342441 is 994771.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 561727765225 + 427841577216 = 749485^2 + 654096^2 .

It is not a de Polignac number, because 989569342441 - 2⁵ = 989569342409 is a prime.

It is a super-2 number, since 2×989569342441² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (989569342241) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 72611470 + ... + 72625096.

It is an arithmetic number, because the mean of its divisors is an integer number (111487157119).

Almost surely, 2^989569342441 is an apocalyptic number.

989569342441 is the 994771-st square number.

989569342441 is the 497386-th centered octagonal number.

It is an amenable number.

989569342441 is a deficient number, since it is larger than the sum of its proper divisors (13815071630).

989569342441 is an frugal number, since it uses more digits than its factorization.

989569342441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27400 (or 13700 counting only the distinct ones).

The product of its digits is 67184640, while the sum is 64.

Multiplying 989569342441 by its sum of digits (64), we get a square (63332437916224 = 7958168²).

The spelling of 989569342441 in words is "nine hundred eighty-nine billion, five hundred sixty-nine million, three hundred forty-two thousand, four hundred forty-one".