108491660260489 has 135 divisors (see below), whose sum is σ = 131018891432247. Its totient is φ = 89768676967200.

The previous prime is 108491660260441. The next prime is 108491660260499. The reversal of 108491660260489 is 984062066194801.

The square root of 108491660260489 is 10415933.

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., 3527947028089 + 104963713232400 = 1878283^2 + 10245180^2 .

It is not a de Polignac number, because 108491660260489 - 2²³ = 108491651871881 is a prime.

It is a super-2 number, since 2×108491660260489² (a number of 29 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 108491660260489.

It is not an unprimeable number, because it can be changed into a prime (108491660260409) by changing a digit.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 1778551807519 + ... + 1778551807579.

Almost surely, 2^{108491660260489} is an apocalyptic number.

108491660260489 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

108491660260489 is the 10415933-rd square number.

108491660260489 is the 5207967-th centered octagonal number.

It is an amenable number.

108491660260489 is a deficient number, since it is larger than the sum of its proper divisors (22527231171758).

108491660260489 is an frugal number, since it uses more digits than its factorization.

108491660260489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306 (or 134 counting only the distinct ones).

The product of its (nonzero) digits is 35831808, while the sum is 64.

The spelling of 108491660260489 in words is "one hundred eight trillion, four hundred ninety-one billion, six hundred sixty million, two hundred sixty thousand, four hundred eighty-nine".