9090910000 has 50 divisors (see below), whose sum is σ = 22010026412. Its totient is φ = 3636360000.

The previous prime is 9090909977. The next prime is 9090910007. The reversal of 9090910000 is 190909.

It is a tau number, because it is divible by the number of its divisors (50).

It is not an unprimeable number, because it can be changed into a prime (9090910007) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 444546 + ... + 464545.

Almost surely, 2^9090910000 is an apocalyptic number.

It is an amenable number.

9090910000 is an abundant number, since it is smaller than the sum of its proper divisors (12919116412).

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

9090910000 is an equidigital number, since it uses as much as digits as its factorization.

9090910000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909119 (or 909098 counting only the distinct ones).

The product of its (nonzero) digits is 729, while the sum is 28.

The square root of 9090910000 is about 95346.2636918721. The cubic root of 9090910000 is about 2087.0640919920.

The spelling of 9090910000 in words is "nine billion, ninety million, nine hundred ten thousand".