1009512500 has 36 divisors (see below), whose sum is σ = 2208194604. Its totient is φ = 403800000.

The previous prime is 1009512467. The next prime is 1009512523. The reversal of 1009512500 is 52159001.

1009512500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 925863184 + 83649316 = 30428^2 + 9146^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27881 + ... + 52880.

It is an arithmetic number, because the mean of its divisors is an integer number (61338739).

Almost surely, 2^1009512500 is an apocalyptic number.

1009512500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1009512500 is an abundant number, since it is smaller than the sum of its proper divisors (1198682104).

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

1009512500 is an frugal number, since it uses more digits than its factorization.

1009512500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80790 (or 80768 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 23.

The square root of 1009512500 is about 31772.8264402146. The cubic root of 1009512500 is about 1003.1608319483.

The spelling of 1009512500 in words is "one billion, nine million, five hundred twelve thousand, five hundred".