1009091009998 has 4 divisors (see below), whose sum is σ = 1513636515000. Its totient is φ = 504545504998.

The previous prime is 1009091009939. The next prime is 1009091010001. The reversal of 1009091009998 is 8999001909001.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252272752498 + ... + 252272752501.

It is an arithmetic number, because the mean of its divisors is an integer number (378409128750).

Almost surely, 2^{1009091009998} is an apocalyptic number.

1009091009998 is a deficient number, since it is larger than the sum of its proper divisors (504545505002).

1009091009998 is an equidigital number, since it uses as much as digits as its factorization.

1009091009998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504545505001.

The product of its (nonzero) digits is 472392, while the sum is 55.

The spelling of 1009091009998 in words is "one trillion, nine billion, ninety-one million, nine thousand, nine hundred ninety-eight".