1165163540 has 24 divisors (see below), whose sum is σ = 2453909472. Its totient is φ = 464719520.

The previous prime is 1165163513. The next prime is 1165163569. The reversal of 1165163540 is 453615611.

It is a junction number, because it is equal to n+sod(n) for n = 1165163497 and 1165163506.

It is a congruent number.

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, 77006 + ... + 90885.

It is an arithmetic number, because the mean of its divisors is an integer number (102246228).

Almost surely, 2^1165163540 is an apocalyptic number.

1165163540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1165163540 is an abundant number, since it is smaller than the sum of its proper divisors (1288745932).

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

1165163540 is a wasteful number, since it uses less digits than its factorization.

1165163540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168247 (or 168245 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 1165163540 is about 34134.4919399718. The cubic root of 1165163540 is about 1052.2742963270.

The spelling of 1165163540 in words is "one billion, one hundred sixty-five million, one hundred sixty-three thousand, five hundred forty".