2168957677 has 4 divisors (see below), whose sum is σ = 2198669500. Its totient is φ = 2139245856.

The previous prime is 2168957657. The next prime is 2168957741. The reversal of 2168957677 is 7767598612.

2168957677 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1696286596 + 472671081 = 41186^2 + 21741^2 .

It is a cyclic number.

It is not a de Polignac number, because 2168957677 - 2¹¹ = 2168955629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2168957657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14855802 + ... + 14855947.

It is an arithmetic number, because the mean of its divisors is an integer number (549667375).

Almost surely, 2^2168957677 is an apocalyptic number.

It is an amenable number.

2168957677 is a deficient number, since it is larger than the sum of its proper divisors (29711823).

2168957677 is an equidigital number, since it uses as much as digits as its factorization.

2168957677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29711822.

The product of its digits is 8890560, while the sum is 58.

The square root of 2168957677 is about 46572.0697092152. The cubic root of 2168957677 is about 1294.4452689839.

The spelling of 2168957677 in words is "two billion, one hundred sixty-eight million, nine hundred fifty-seven thousand, six hundred seventy-seven".