11553215018 has 8 divisors (see below), whose sum is σ = 17330297700. Its totient is φ = 5776449120.

The previous prime is 11553214979. The next prime is 11553215029. The reversal of 11553215018 is 81051235511.

It can be written as a sum of positive squares in 2 ways, for example, as 11516938489 + 36276529 = 107317^2 + 6023^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63158 + ... + 164606.

Almost surely, 2^11553215018 is an apocalyptic number.

11553215018 is a deficient number, since it is larger than the sum of its proper divisors (5777082682).

11553215018 is a wasteful number, since it uses less digits than its factorization.

11553215018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158392.

The product of its (nonzero) digits is 6000, while the sum is 32.

The spelling of 11553215018 in words is "eleven billion, five hundred fifty-three million, two hundred fifteen thousand, eighteen".