11818699198 has 4 divisors (see below), whose sum is σ = 17728048800. Its totient is φ = 5909349598.

The previous prime is 11818699171. The next prime is 11818699199. The reversal of 11818699198 is 89199681811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89199681811 = 197 ⋅452790263.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11818699199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2954674798 + ... + 2954674801.

It is an arithmetic number, because the mean of its divisors is an integer number (4432012200).

Almost surely, 2^11818699198 is an apocalyptic number.

11818699198 is a deficient number, since it is larger than the sum of its proper divisors (5909349602).

11818699198 is an equidigital number, since it uses as much as digits as its factorization.

11818699198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5909349601.

The product of its digits is 2239488, while the sum is 61.

The spelling of 11818699198 in words is "eleven billion, eight hundred eighteen million, six hundred ninety-nine thousand, one hundred ninety-eight".