1158845791009 has 9 divisors (see below), whose sum is σ = 1162059394041. Its totient is φ = 1155641059440.

The previous prime is 1158845790997. The next prime is 1158845791013. The reversal of 1158845791009 is 9001975488511.

The square root of 1158845791009 is 1076497.

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

It can be written as a sum of positive squares in 4 ways, for example, as 581963008225 + 576882782784 = 762865^2 + 759528^2 .

It is not a de Polignac number, because 1158845791009 - 2³¹ = 1156698307361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1158845791309) 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, 453203959 + ... + 453206515.

It is an arithmetic number, because the mean of its divisors is an integer number (129117710449).

Almost surely, 2^{1158845791009} is an apocalyptic number.

1158845791009 is the 1076497-th square number.

1158845791009 is the 538249-th centered octagonal number.

It is an amenable number.

1158845791009 is a deficient number, since it is larger than the sum of its proper divisors (3213603032).

1158845791009 is an frugal number, since it uses more digits than its factorization.

1158845791009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5956 (or 2978 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 58.

The spelling of 1158845791009 in words is "one trillion, one hundred fifty-eight billion, eight hundred forty-five million, seven hundred ninety-one thousand, nine".