909091010000 has 50 divisors (see below), whose sum is σ = 2201000268522. Its totient is φ = 363636400000.

The previous prime is 909091009993. The next prime is 909091010041. The reversal of 909091010000 is 10190909.

It can be written as a sum of positive squares in 5 ways, for example, as 370652051344 + 538438958656 = 608812^2 + 733784^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 45444551 + ... + 45464550.

Almost surely, 2^909091010000 is an apocalyptic number.

It is an amenable number.

909091010000 is an abundant number, since it is smaller than the sum of its proper divisors (1291909258522).

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

909091010000 is an equidigital number, since it uses as much as digits as its factorization.

909091010000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90909129 (or 90909108 counting only the distinct ones).

The product of its (nonzero) digits is 729, while the sum is 29.

The spelling of 909091010000 in words is "nine hundred nine billion, ninety-one million, ten thousand".