11818653898 has 4 divisors (see below), whose sum is σ = 17727980850. Its totient is φ = 5909326948.

The previous prime is 11818653871. The next prime is 11818653901. The reversal of 11818653898 is 89835681811.

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

It can be written as a sum of positive squares in only one way, i.e., 11240876529 + 577777369 = 106023^2 + 24037^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2954663473 + ... + 2954663476.

Almost surely, 2^11818653898 is an apocalyptic number.

11818653898 is a deficient number, since it is larger than the sum of its proper divisors (5909326952).

11818653898 is an equidigital number, since it uses as much as digits as its factorization.

11818653898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5909326951.

The product of its digits is 3317760, while the sum is 58.

The spelling of 11818653898 in words is "eleven billion, eight hundred eighteen million, six hundred fifty-three thousand, eight hundred ninety-eight".