1158191469 has 6 divisors (see below), whose sum is σ = 1672943246. Its totient is φ = 772127640.

The previous prime is 1158191407. The next prime is 1158191471. The reversal of 1158191469 is 9641918511.

1158191469 is a `hidden beast` number, since 1 + 1 + 581 + 9 + 1 + 4 + 69 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1148193225 + 9998244 = 33885^2 + 3162^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1158191469 is a prime.

It is a super-2 number, since 2×1158191469² = 2682814957728755922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1158191479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 64343962 + ... + 64343979.

Almost surely, 2^1158191469 is an apocalyptic number.

It is an amenable number.

1158191469 is a deficient number, since it is larger than the sum of its proper divisors (514751777).

1158191469 is a wasteful number, since it uses less digits than its factorization.

1158191469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128687947 (or 128687944 counting only the distinct ones).

The product of its digits is 77760, while the sum is 45.

The square root of 1158191469 is about 34032.2122260661. The cubic root of 1158191469 is about 1050.1712400989.

The spelling of 1158191469 in words is "one billion, one hundred fifty-eight million, one hundred ninety-one thousand, four hundred sixty-nine".