7278305683877 has 2 divisors, whose sum is σ = 7278305683878. Its totient is φ = 7278305683876.

The previous prime is 7278305683841. The next prime is 7278305683879. The reversal of 7278305683877 is 7783865038727.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7272007515556 + 6298168321 = 2696666^2 + 79361^2 .

It is a cyclic number.

It is not a de Polignac number, because 7278305683877 - 2¹⁰ = 7278305682853 is a prime.

It is a super-2 number, since 2×7278305683877² (a number of 27 digits) contains 22 as substring.

Together with 7278305683879, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7278305683877.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7278305683879) 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, 3639152841938 + 3639152841939.

It is an arithmetic number, because the mean of its divisors is an integer number (3639152841939).

Almost surely, 2^{7278305683877} is an apocalyptic number.

It is an amenable number.

7278305683877 is a deficient number, since it is larger than the sum of its proper divisors (1).

7278305683877 is an equidigital number, since it uses as much as digits as its factorization.

7278305683877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 663828480, while the sum is 71.

The spelling of 7278305683877 in words is "seven trillion, two hundred seventy-eight billion, three hundred five million, six hundred eighty-three thousand, eight hundred seventy-seven".