11909489898 has 8 divisors (see below), whose sum is σ = 23818979808. Its totient is φ = 3969829964.

The previous prime is 11909489887. The next prime is 11909489909. The reversal of 11909489898 is 89898490911.

It is an interprime number because it is at equal distance from previous prime (11909489887) and next prime (11909489909).

It is a sphenic number, since it is the product of 3 distinct primes.

11909489898 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 992457486 + ... + 992457497.

It is an arithmetic number, because the mean of its divisors is an integer number (2977372476).

Almost surely, 2^11909489898 is an apocalyptic number.

11909489898 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

11909489898 is a wasteful number, since it uses less digits than its factorization.

11909489898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1984914988.

The product of its (nonzero) digits is 13436928, while the sum is 66.

The spelling of 11909489898 in words is "eleven billion, nine hundred nine million, four hundred eighty-nine thousand, eight hundred ninety-eight".