1151165178 has 24 divisors (see below), whose sum is σ = 2528361108. Its totient is φ = 378464832.

The previous prime is 1151165173. The next prime is 1151165189. The reversal of 1151165178 is 8715611511.

1151165178 is a `hidden beast` number, since 11 + 511 + 65 + 1 + 78 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1007237169 + 143928009 = 31737^2 + 11997^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1151165173) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 436725 + ... + 439352.

Almost surely, 2^1151165178 is an apocalyptic number.

1151165178 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1151165178 is an abundant number, since it is smaller than the sum of its proper divisors (1377195930).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1151165178 is a wasteful number, since it uses less digits than its factorization.

1151165178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876158 (or 876155 counting only the distinct ones).

The product of its digits is 8400, while the sum is 36.

The square root of 1151165178 is about 33928.8251786000. The cubic root of 1151165178 is about 1048.0432728136.

Adding to 1151165178 its reverse (8715611511), we get a palindrome (9866776689).

The spelling of 1151165178 in words is "one billion, one hundred fifty-one million, one hundred sixty-five thousand, one hundred seventy-eight".