677113391161 has 9 divisors (see below), whose sum is σ = 680730933549. Its totient is φ = 673514985024.

The previous prime is 677113391117. The next prime is 677113391189. The reversal of 677113391161 is 161193311776.

The square root of 677113391161 is 822869.

It is a perfect power (a square), and thus also a powerful number.

677113391161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 563503947561 + 113609443600 = 750669^2 + 337060^2 .

It is not a de Polignac number, because 677113391161 - 2⁷ = 677113391033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (677113391561) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 162103105 + ... + 162107281.

Almost surely, 2^677113391161 is an apocalyptic number.

677113391161 is the 822869-th square number.

677113391161 is the 411435-th centered octagonal number.

It is an amenable number.

677113391161 is a deficient number, since it is larger than the sum of its proper divisors (3617542388).

677113391161 is an frugal number, since it uses more digits than its factorization.

677113391161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8748 (or 4374 counting only the distinct ones).

The product of its digits is 142884, while the sum is 46.

The spelling of 677113391161 in words is "six hundred seventy-seven billion, one hundred thirteen million, three hundred ninety-one thousand, one hundred sixty-one".