681707781711 has 24 divisors (see below), whose sum is σ = 1074280681344. Its totient is φ = 413127585360.

The previous prime is 681707781707. The next prime is 681707781731. The reversal of 681707781711 is 117187707186.

It is not a de Polignac number, because 681707781711 - 2² = 681707781707 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681707781731) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1242540 + ... + 1705086.

It is an arithmetic number, because the mean of its divisors is an integer number (44761695056).

Almost surely, 2^681707781711 is an apocalyptic number.

681707781711 is a deficient number, since it is larger than the sum of its proper divisors (392572899633).

681707781711 is a wasteful number, since it uses less digits than its factorization.

681707781711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477451 (or 477448 counting only the distinct ones).

The product of its (nonzero) digits is 921984, while the sum is 54.

The spelling of 681707781711 in words is "six hundred eighty-one billion, seven hundred seven million, seven hundred eighty-one thousand, seven hundred eleven".