6778425853 has 2 divisors, whose sum is σ = 6778425854. Its totient is φ = 6778425852.

The previous prime is 6778425847. The next prime is 6778425881. The reversal of 6778425853 is 3585248776.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5733972729 + 1044453124 = 75723^2 + 32318^2 .

It is a cyclic number.

It is not a de Polignac number, because 6778425853 - 2²⁹ = 6241554941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6778425794 and 6778425803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6778425833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3389212926 + 3389212927.

It is an arithmetic number, because the mean of its divisors is an integer number (3389212927).

Almost surely, 2^6778425853 is an apocalyptic number.

It is an amenable number.

6778425853 is a deficient number, since it is larger than the sum of its proper divisors (1).

6778425853 is an equidigital number, since it uses as much as digits as its factorization.

6778425853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11289600, while the sum is 55.

The square root of 6778425853 is about 82331.1961105874. The cubic root of 6778425853 is about 1892.5307728890.

The spelling of 6778425853 in words is "six billion, seven hundred seventy-eight million, four hundred twenty-five thousand, eight hundred fifty-three".