1001165500 has 24 divisors (see below), whose sum is σ = 2186546544. Its totient is φ = 400466000.

The previous prime is 1001165467. The next prime is 1001165507. The reversal of 1001165500 is 55611001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001165507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1000666 + ... + 1001665.

It is an arithmetic number, because the mean of its divisors is an integer number (91106106).

Almost surely, 2^1001165500 is an apocalyptic number.

1001165500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001165500 is an abundant number, since it is smaller than the sum of its proper divisors (1185381044).

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

1001165500 is a wasteful number, since it uses less digits than its factorization.

1001165500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2002350 (or 2002338 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 1001165500 is about 31641.1994083663. The cubic root of 1001165500 is about 1000.3883491654.

Adding to 1001165500 its reverse (55611001), we get a palindrome (1056776501).

The spelling of 1001165500 in words is "one billion, one million, one hundred sixty-five thousand, five hundred".