11643813998 has 4 divisors (see below), whose sum is σ = 17465721000. Its totient is φ = 5821906998.

The previous prime is 11643813967. The next prime is 11643814037. The reversal of 11643813998 is 89931834611.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2910953498 + ... + 2910953501.

It is an arithmetic number, because the mean of its divisors is an integer number (4366430250).

Almost surely, 2^11643813998 is an apocalyptic number.

11643813998 is a deficient number, since it is larger than the sum of its proper divisors (5821907002).

11643813998 is an equidigital number, since it uses as much as digits as its factorization.

11643813998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5821907001.

The product of its digits is 1119744, while the sum is 53.

The spelling of 11643813998 in words is "eleven billion, six hundred forty-three million, eight hundred thirteen thousand, nine hundred ninety-eight".