681504711 has 16 divisors (see below), whose sum is σ = 957728640. Its totient is φ = 429870240.

The previous prime is 681504689. The next prime is 681504737. The reversal of 681504711 is 117405186.

It is a happy number.

It is not a de Polignac number, because 681504711 - 2⁹ = 681504199 is a prime.

It is a super-2 number, since 2×681504711² = 928897342230387042, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681504781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39516 + ... + 54078.

It is an arithmetic number, because the mean of its divisors is an integer number (59858040).

Almost surely, 2^681504711 is an apocalyptic number.

681504711 is a deficient number, since it is larger than the sum of its proper divisors (276223929).

681504711 is a wasteful number, since it uses less digits than its factorization.

681504711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15406.

The product of its (nonzero) digits is 6720, while the sum is 33.

The square root of 681504711 is about 26105.6451940955. The cubic root of 681504711 is about 880.0140799228.

Adding to 681504711 its reverse (117405186), we get a palindrome (798909897).

The spelling of 681504711 in words is "six hundred eighty-one million, five hundred four thousand, seven hundred eleven".