6548399163818 has 4 divisors (see below), whose sum is σ = 9822598745730. Its totient is φ = 3274199581908.

The previous prime is 6548399163809. The next prime is 6548399163853. The reversal of 6548399163818 is 8183619938456.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6063054254929 + 485344908889 = 2462327^2 + 696667^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1637099790953 + ... + 1637099790956.

Almost surely, 2^{6548399163818} is an apocalyptic number.

6548399163818 is a deficient number, since it is larger than the sum of its proper divisors (3274199581912).

6548399163818 is a wasteful number, since it uses less digits than its factorization.

6548399163818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3274199581911.

The product of its digits is 268738560, while the sum is 71.

The spelling of 6548399163818 in words is "six trillion, five hundred forty-eight billion, three hundred ninety-nine million, one hundred sixty-three thousand, eight hundred eighteen".