13440519418 has 8 divisors (see below), whose sum is σ = 20541171348. Its totient is φ = 6593462304.

The previous prime is 13440519401. The next prime is 13440519419. The reversal of 13440519418 is 81491504431.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12750248889 + 690270529 = 112917^2 + 26273^2 .

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

It is not an unprimeable number, because it can be changed into a prime (13440519419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63398571 + ... + 63398782.

Almost surely, 2^13440519418 is an apocalyptic number.

13440519418 is a deficient number, since it is larger than the sum of its proper divisors (7100651930).

13440519418 is a wasteful number, since it uses less digits than its factorization.

13440519418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126797408.

The product of its (nonzero) digits is 69120, while the sum is 40.

The spelling of 13440519418 in words is "thirteen billion, four hundred forty million, five hundred nineteen thousand, four hundred eighteen".