6547442618401 has 4 divisors (see below), whose sum is σ = 6547594458132. Its totient is φ = 6547290778672.

The previous prime is 6547442618323. The next prime is 6547442618419. The reversal of 6547442618401 is 1048162447456.

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 2 ways, for example, as 1698643022400 + 4848799596001 = 1303320^2 + 2201999^2 .

It is a cyclic number.

It is not a de Polignac number, because 6547442618401 - 2⁹ = 6547442617889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6547442618461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75855166 + ... + 75941431.

It is an arithmetic number, because the mean of its divisors is an integer number (1636898614533).

Almost surely, 2^{6547442618401} is an apocalyptic number.

It is an amenable number.

6547442618401 is a deficient number, since it is larger than the sum of its proper divisors (151839731).

6547442618401 is a wasteful number, since it uses less digits than its factorization.

6547442618401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151839730.

The product of its (nonzero) digits is 5160960, while the sum is 52.

The spelling of 6547442618401 in words is "six trillion, five hundred forty-seven billion, four hundred forty-two million, six hundred eighteen thousand, four hundred one".