11909489897 has 8 divisors (see below), whose sum is σ = 12017381376. Its totient is φ = 11801819232.

The previous prime is 11909489887. The next prime is 11909489909. The reversal of 11909489897 is 79898490911.

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

It is a cyclic number.

It is not a de Polignac number, because 11909489897 - 2⁶ = 11909489833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11909489887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54128 + ... + 163550.

It is an arithmetic number, because the mean of its divisors is an integer number (1502172672).

Almost surely, 2^11909489897 is an apocalyptic number.

It is an amenable number.

11909489897 is a deficient number, since it is larger than the sum of its proper divisors (107891479).

11909489897 is a wasteful number, since it uses less digits than its factorization.

11909489897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110407.

The product of its (nonzero) digits is 11757312, while the sum is 65.

The spelling of 11909489897 in words is "eleven billion, nine hundred nine million, four hundred eighty-nine thousand, eight hundred ninety-seven".