1151601165 has 256 divisors, whose sum is σ = 2656281600. Its totient is φ = 468357120.

The previous prime is 1151601163. The next prime is 1151601167. The reversal of 1151601165 is 5611061511.

1151601165 is a `hidden beast` number, since 1 + 1 + 51 + 601 + 1 + 6 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (1151601163) and next prime (1151601167).

It is not a de Polignac number, because 1151601165 - 2¹ = 1151601163 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151601163) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 39710371 + ... + 39710399.

It is an arithmetic number, because the mean of its divisors is an integer number (10376100).

Almost surely, 2^1151601165 is an apocalyptic number.

1151601165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1151601165 is an abundant number, since it is smaller than the sum of its proper divisors (1504680435).

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

1151601165 is a wasteful number, since it uses less digits than its factorization.

1151601165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 27.

The square root of 1151601165 is about 33935.2495938957. The cubic root of 1151601165 is about 1048.1755664750.

Adding to 1151601165 its reverse (5611061511), we get a palindrome (6762662676).

The spelling of 1151601165 in words is "one billion, one hundred fifty-one million, six hundred one thousand, one hundred sixty-five".