1165165101 has 64 divisors (see below), whose sum is σ = 1922457600. Its totient is φ = 694396800.

The previous prime is 1165165097. The next prime is 1165165117. The reversal of 1165165101 is 1015615611.

1165165101 is a `hidden beast` number, since 1 + 1 + 6 + 5 + 1 + 651 + 0 + 1 = 666.

It is not a de Polignac number, because 1165165101 - 2² = 1165165097 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165165121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 651130 + ... + 652916.

It is an arithmetic number, because the mean of its divisors is an integer number (30038400).

Almost surely, 2^1165165101 is an apocalyptic number.

It is an amenable number.

1165165101 is a deficient number, since it is larger than the sum of its proper divisors (757292499).

1165165101 is a wasteful number, since it uses less digits than its factorization.

1165165101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1887 (or 1881 counting only the distinct ones).

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

The square root of 1165165101 is about 34134.5148053989. The cubic root of 1165165101 is about 1052.2747662465.

The spelling of 1165165101 in words is "one billion, one hundred sixty-five million, one hundred sixty-five thousand, one hundred one".