7187019318881 has 2 divisors, whose sum is σ = 7187019318882. Its totient is φ = 7187019318880.

The previous prime is 7187019318767. The next prime is 7187019318889. The reversal of 7187019318881 is 1888139107817.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4848517744225 + 2338501574656 = 2201935^2 + 1529216^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7187019318881 is a prime.

It is a super-2 number, since 2×7187019318881² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7187019318889) 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 as a sum of consecutive naturals, namely, 3593509659440 + 3593509659441.

It is an arithmetic number, because the mean of its divisors is an integer number (3593509659441).

Almost surely, 2^{7187019318881} is an apocalyptic number.

It is an amenable number.

7187019318881 is a deficient number, since it is larger than the sum of its proper divisors (1).

7187019318881 is an equidigital number, since it uses as much as digits as its factorization.

7187019318881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5419008, while the sum is 62.

The spelling of 7187019318881 in words is "seven trillion, one hundred eighty-seven billion, nineteen million, three hundred eighteen thousand, eight hundred eighty-one".