2680857729 has 45 divisors (see below), whose sum is σ = 4410334929. Its totient is φ = 1621655640.

The previous prime is 2680857719. The next prime is 2680857749. The reversal of 2680857729 is 9277580862.

It is a happy number.

The square root of 2680857729 is 51777.

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

2680857729 is a `hidden beast` number, since 2 + 68 + 0 + 8 + 577 + 2 + 9 = 666.

It is not a de Polignac number, because 2680857729 - 2⁷ = 2680857601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2680857719) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 5125662 + ... + 5126184.

Almost surely, 2^2680857729 is an apocalyptic number.

2680857729 is the 51777-th square number.

2680857729 is the 25889-th centered octagonal number.

It is an amenable number.

2680857729 is a deficient number, since it is larger than the sum of its proper divisors (1729477200).

2680857729 is an frugal number, since it uses more digits than its factorization.

2680857729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080 (or 537 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 54.

The cubic root of 2680857729 is about 1389.1780812777.

The spelling of 2680857729 in words is "two billion, six hundred eighty million, eight hundred fifty-seven thousand, seven hundred twenty-nine".