1618873144449 has 8 divisors (see below), whose sum is σ = 2354724573792. Its totient is φ = 981135239040.

The previous prime is 1618873144411. The next prime is 1618873144451. The reversal of 1618873144449 is 9444413788161.

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

It is not a de Polignac number, because 1618873144449 - 2²⁰ = 1618872095873 is a prime.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 1618873144392 and 1618873144401.

It is not an unprimeable number, because it can be changed into a prime (1618873144489) 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, 24528380944 + ... + 24528381009.

It is an arithmetic number, because the mean of its divisors is an integer number (294340571724).

Almost surely, 2^{1618873144449} is an apocalyptic number.

It is an amenable number.

1618873144449 is a deficient number, since it is larger than the sum of its proper divisors (735851429343).

1618873144449 is a wasteful number, since it uses less digits than its factorization.

1618873144449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49056761967.

The product of its digits is 18579456, while the sum is 60.

The spelling of 1618873144449 in words is "one trillion, six hundred eighteen billion, eight hundred seventy-three million, one hundred forty-four thousand, four hundred forty-nine".