7888888405481 has 2 divisors, whose sum is σ = 7888888405482. Its totient is φ = 7888888405480.

The previous prime is 7888888405477. The next prime is 7888888405483. The reversal of 7888888405481 is 1845048888887.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4766104625881 + 3122783779600 = 2183141^2 + 1767140^2 .

It is an emirp because it is prime and its reverse (1845048888887) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7888888405481 - 2² = 7888888405477 is a prime.

It is a super-2 number, since 2×7888888405481² (a number of 27 digits) contains 22 as substring.

Together with 7888888405483, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7888888405483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3944444202740 + 3944444202741.

It is an arithmetic number, because the mean of its divisors is an integer number (3944444202741).

Almost surely, 2^{7888888405481} is an apocalyptic number.

It is an amenable number.

7888888405481 is a deficient number, since it is larger than the sum of its proper divisors (1).

7888888405481 is an equidigital number, since it uses as much as digits as its factorization.

7888888405481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1174405120, while the sum is 77.

The spelling of 7888888405481 in words is "seven trillion, eight hundred eighty-eight billion, eight hundred eighty-eight million, four hundred five thousand, four hundred eighty-one".