681828459 has 16 divisors (see below), whose sum is σ = 980263200. Its totient is φ = 419060736.

The previous prime is 681828457. The next prime is 681828487. The reversal of 681828459 is 954828186.

It is not a de Polignac number, because 681828459 - 2¹ = 681828457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (681828457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21787 + ... + 42875.

It is an arithmetic number, because the mean of its divisors is an integer number (61266450).

Almost surely, 2^681828459 is an apocalyptic number.

681828459 is a deficient number, since it is larger than the sum of its proper divisors (298434741).

681828459 is a wasteful number, since it uses less digits than its factorization.

681828459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21934.

The product of its digits is 1105920, while the sum is 51.

The square root of 681828459 is about 26111.8451856624. The cubic root of 681828459 is about 880.1534077423.

The spelling of 681828459 in words is "six hundred eighty-one million, eight hundred twenty-eight thousand, four hundred fifty-nine".