130881768287449 has 3 divisors (see below), whose sum is σ = 130881779727807. Its totient is φ = 130881756847092.

The previous prime is 130881768287443. The next prime is 130881768287453. The reversal of 130881768287449 is 944782867188031.

The square root of 130881768287449 is 11440357.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1826079255625 + 129055689031824 = 1351325^2 + 11360268^2 .

It is not a de Polignac number, because 130881768287449 - 2²¹ = 130881766190297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130881768287443) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 5720179 + ... + 17160535.

It is an arithmetic number, because the mean of its divisors is an integer number (43627259909269).

Almost surely, 2^{130881768287449} is an apocalyptic number.

130881768287449 is the 11440357-th square number.

130881768287449 is the 5720179-th centered octagonal number.

It is an amenable number.

130881768287449 is a deficient number, since it is larger than the sum of its proper divisors (11440358).

130881768287449 is an frugal number, since it uses more digits than its factorization.

130881768287449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22880714 (or 11440357 counting only the distinct ones).

The product of its (nonzero) digits is 1040449536, while the sum is 76.

The spelling of 130881768287449 in words is "one hundred thirty trillion, eight hundred eighty-one billion, seven hundred sixty-eight million, two hundred eighty-seven thousand, four hundred forty-nine".