11398999689 has 36 divisors (see below), whose sum is σ = 20683598208. Its totient is φ = 5921554320.

The previous prime is 11398999679. The next prime is 11398999693. The reversal of 11398999689 is 98699989311.

It is not a de Polignac number, because 11398999689 - 2⁴ = 11398999673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11398999679) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 740049 + ... + 755294.

Almost surely, 2^11398999689 is an apocalyptic number.

It is an amenable number.

11398999689 is a deficient number, since it is larger than the sum of its proper divisors (9284598519).

11398999689 is a wasteful number, since it uses less digits than its factorization.

11398999689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495378 (or 1495364 counting only the distinct ones).

The product of its digits is 68024448, while the sum is 72.

The spelling of 11398999689 in words is "eleven billion, three hundred ninety-eight million, nine hundred ninety-nine thousand, six hundred eighty-nine".