677826613951171 has 2 divisors, whose sum is σ = 677826613951172. Its totient is φ = 677826613951170.

The previous prime is 677826613951121. The next prime is 677826613951241. The reversal of 677826613951171 is 171159316628776.

It is an a-pointer prime, because the next prime (677826613951241) can be obtained adding 677826613951171 to its sum of digits (70).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 677826613951171 - 2²¹ = 677826611854019 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 677826613951171.

It is not a weakly prime, because it can be changed into another prime (677826613951121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338913306975585 + 338913306975586.

It is an arithmetic number, because the mean of its divisors is an integer number (338913306975586).

Almost surely, 2^{677826613951171} is an apocalyptic number.

677826613951171 is a deficient number, since it is larger than the sum of its proper divisors (1).

677826613951171 is an equidigital number, since it uses as much as digits as its factorization.

677826613951171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 160030080, while the sum is 70.

The spelling of 677826613951171 in words is "six hundred seventy-seven trillion, eight hundred twenty-six billion, six hundred thirteen million, nine hundred fifty-one thousand, one hundred seventy-one".