1165379818 has 16 divisors (see below), whose sum is σ = 1896043464. Its totient is φ = 535037440.

The previous prime is 1165379791. The next prime is 1165379821. The reversal of 1165379818 is 8189735611.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 539029089 + 626350729 = 23217^2 + 25027^2 .

It is a super-2 number, since 2×1165379818² = 2716220240403426248, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 416605 + ... + 419392.

Almost surely, 2^1165379818 is an apocalyptic number.

1165379818 is a deficient number, since it is larger than the sum of its proper divisors (730663646).

1165379818 is a wasteful number, since it uses less digits than its factorization.

1165379818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836057.

The product of its digits is 362880, while the sum is 49.

The square root of 1165379818 is about 34137.6598202044. The cubic root of 1165379818 is about 1052.3394001207.

The spelling of 1165379818 in words is "one billion, one hundred sixty-five million, three hundred seventy-nine thousand, eight hundred eighteen".