11291215898 has 8 divisors (see below), whose sum is σ = 16960986900. Its totient is φ = 5637553600.

The previous prime is 11291215849. The next prime is 11291215909. The reversal of 11291215898 is 89851219211.

It can be written as a sum of positive squares in 2 ways, for example, as 11173124209 + 118091689 = 105703^2 + 10867^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4025423 + ... + 4028226.

Almost surely, 2^11291215898 is an apocalyptic number.

11291215898 is a deficient number, since it is larger than the sum of its proper divisors (5669771002).

11291215898 is an equidigital number, since it uses as much as digits as its factorization.

11291215898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8054352.

The product of its digits is 103680, while the sum is 47.

The spelling of 11291215898 in words is "eleven billion, two hundred ninety-one million, two hundred fifteen thousand, eight hundred ninety-eight".