6648047394893 has 4 divisors (see below), whose sum is σ = 6877290408540. Its totient is φ = 6418804381248.

The previous prime is 6648047394883. The next prime is 6648047394941. The reversal of 6648047394893 is 3984937408466.

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 1157522077924 + 5490525316969 = 1075882^2 + 2343187^2 .

It is not a de Polignac number, because 6648047394893 - 2²⁰ = 6648046346317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6648047394883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114621506780 + ... + 114621506837.

It is an arithmetic number, because the mean of its divisors is an integer number (1719322602135).

Almost surely, 2^{6648047394893} is an apocalyptic number.

It is an amenable number.

6648047394893 is a deficient number, since it is larger than the sum of its proper divisors (229243013647).

6648047394893 is a wasteful number, since it uses less digits than its factorization.

6648047394893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229243013646.

The product of its (nonzero) digits is 752467968, while the sum is 71.

The spelling of 6648047394893 in words is "six trillion, six hundred forty-eight billion, forty-seven million, three hundred ninety-four thousand, eight hundred ninety-three".