7813144420001 has 4 divisors (see below), whose sum is σ = 7818521671572. Its totient is φ = 7807767168432.

The previous prime is 7813144419967. The next prime is 7813144420073. The reversal of 7813144420001 is 1000244413187.

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 7577605035025 + 235539384976 = 2752745^2 + 485324^2 .

It is a cyclic number.

It is not a de Polignac number, because 7813144420001 - 2¹⁰ = 7813144418977 is a prime.

It is a super-2 number, since 2×7813144420001² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7813144425001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2688623606 + ... + 2688626511.

It is an arithmetic number, because the mean of its divisors is an integer number (1954630417893).

Almost surely, 2^{7813144420001} is an apocalyptic number.

It is an amenable number.

7813144420001 is a deficient number, since it is larger than the sum of its proper divisors (5377251571).

7813144420001 is a wasteful number, since it uses less digits than its factorization.

7813144420001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5377251570.

The product of its (nonzero) digits is 21504, while the sum is 35.

Adding to 7813144420001 its reverse (1000244413187), we get a palindrome (8813388833188).

The spelling of 7813144420001 in words is "seven trillion, eight hundred thirteen billion, one hundred forty-four million, four hundred twenty thousand, one".