13440185618 has 8 divisors (see below), whose sum is σ = 21346177212. Its totient is φ = 6324793216.

The previous prime is 13440185599. The next prime is 13440185621. The reversal of 13440185618 is 81658104431.

It can be written as a sum of positive squares in 2 ways, for example, as 12883839049 + 556346569 = 113507^2 + 23587^2 .

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, 197649755 + ... + 197649822.

Almost surely, 2^13440185618 is an apocalyptic number.

13440185618 is a deficient number, since it is larger than the sum of its proper divisors (7905991594).

13440185618 is a wasteful number, since it uses less digits than its factorization.

13440185618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395299596.

The product of its (nonzero) digits is 92160, while the sum is 41.

The spelling of 13440185618 in words is "thirteen billion, four hundred forty million, one hundred eighty-five thousand, six hundred eighteen".