18464425449 has 8 divisors (see below), whose sum is σ = 25191774432. Its totient is φ = 12023346720.

The previous prime is 18464425403. The next prime is 18464425451. The reversal of 18464425449 is 94452446481.

It is a happy number.

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

It is not a de Polignac number, because 18464425449 - 2¹⁶ = 18464359913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18464425349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71567412 + ... + 71567669.

It is an arithmetic number, because the mean of its divisors is an integer number (3148971804).

Almost surely, 2^18464425449 is an apocalyptic number.

It is an amenable number.

18464425449 is a deficient number, since it is larger than the sum of its proper divisors (6727348983).

18464425449 is a wasteful number, since it uses less digits than its factorization.

18464425449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143135127.

The product of its digits is 4423680, while the sum is 51.

The spelling of 18464425449 in words is "eighteen billion, four hundred sixty-four million, four hundred twenty-five thousand, four hundred forty-nine".