681353811 has 18 divisors (see below), whose sum is σ = 1019296460. Its totient is φ = 438567696.

The previous prime is 681353789. The next prime is 681353831. The reversal of 681353811 is 118353186.

It is not a de Polignac number, because 681353811 - 2¹¹ = 681351763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (681353831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 37441 + ... + 52578.

Almost surely, 2^681353811 is an apocalyptic number.

681353811 is a deficient number, since it is larger than the sum of its proper divisors (337942649).

681353811 is a wasteful number, since it uses less digits than its factorization.

681353811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90083 (or 90051 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 681353811 is about 26102.7548546126. The cubic root of 681353811 is about 879.9491236944.

The spelling of 681353811 in words is "six hundred eighty-one million, three hundred fifty-three thousand, eight hundred eleven".