1158271617 has 4 divisors (see below), whose sum is σ = 1544362160. Its totient is φ = 772181076.

The previous prime is 1158271601. The next prime is 1158271627. The reversal of 1158271617 is 7161728511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1158271617 - 2⁴ = 1158271601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1158271627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193045267 + ... + 193045272.

It is an arithmetic number, because the mean of its divisors is an integer number (386090540).

Almost surely, 2^1158271617 is an apocalyptic number.

It is an amenable number.

1158271617 is a deficient number, since it is larger than the sum of its proper divisors (386090543).

1158271617 is an equidigital number, since it uses as much as digits as its factorization.

1158271617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386090542.

The product of its digits is 23520, while the sum is 39.

The square root of 1158271617 is about 34033.3897371390. The cubic root of 1158271617 is about 1050.1954638377.

The spelling of 1158271617 in words is "one billion, one hundred fifty-eight million, two hundred seventy-one thousand, six hundred seventeen".