1158158771 has 16 divisors (see below), whose sum is σ = 1447994880. Its totient is φ = 899926080.

The previous prime is 1158158747. The next prime is 1158158777. The reversal of 1158158771 is 1778518511.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1158158771 - 2¹⁰ = 1158157747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1158158777) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6695 + ... + 48591.

It is an arithmetic number, because the mean of its divisors is an integer number (90499680).

Almost surely, 2^1158158771 is an apocalyptic number.

1158158771 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1158158771 is a deficient number, since it is larger than the sum of its proper divisors (289836109).

1158158771 is a wasteful number, since it uses less digits than its factorization.

1158158771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42274.

The product of its digits is 78400, while the sum is 44.

The square root of 1158158771 is about 34031.7318248719. The cubic root of 1158158771 is about 1050.1613572130.

The spelling of 1158158771 in words is "one billion, one hundred fifty-eight million, one hundred fifty-eight thousand, seven hundred seventy-one".