677845164649 has 2 divisors, whose sum is σ = 677845164650. Its totient is φ = 677845164648.

The previous prime is 677845164629. The next prime is 677845164653. The reversal of 677845164649 is 946461548776.

677845164649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 632610255424 + 45234909225 = 795368^2 + 212685^2 .

It is a cyclic number.

It is not a de Polignac number, because 677845164649 - 2¹¹ = 677845162601 is a prime.

It is not a weakly prime, because it can be changed into another prime (677845164629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338922582324 + 338922582325.

It is an arithmetic number, because the mean of its divisors is an integer number (338922582325).

Almost surely, 2^677845164649 is an apocalyptic number.

It is an amenable number.

677845164649 is a deficient number, since it is larger than the sum of its proper divisors (1).

677845164649 is an equidigital number, since it uses as much as digits as its factorization.

677845164649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 243855360, while the sum is 67.

The spelling of 677845164649 in words is "six hundred seventy-seven billion, eight hundred forty-five million, one hundred sixty-four thousand, six hundred forty-nine".