1129018877809 has 9 divisors (see below), whose sum is σ = 1146193687737. Its totient is φ = 1112097721284.

The previous prime is 1129018877803. The next prime is 1129018877821. The reversal of 1129018877809 is 9087788109211.

The square root of 1129018877809 is 1062553.

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

It is not a de Polignac number, because 1129018877809 - 2⁹ = 1129018877297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1129018877803) 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, 71183122 + ... + 71198980.

It is an arithmetic number, because the mean of its divisors is an integer number (127354854193).

Almost surely, 2^{1129018877809} is an apocalyptic number.

1129018877809 is the 1062553-rd square number.

1129018877809 is the 531277-th centered octagonal number.

It is an amenable number.

1129018877809 is a deficient number, since it is larger than the sum of its proper divisors (17174809928).

1129018877809 is an frugal number, since it uses more digits than its factorization.

1129018877809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31852 (or 15926 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 61.

The spelling of 1129018877809 in words is "one trillion, one hundred twenty-nine billion, eighteen million, eight hundred seventy-seven thousand, eight hundred nine".