681769747367 has 16 divisors (see below), whose sum is σ = 725563085760. Its totient is φ = 639180402432.

The previous prime is 681769747349. The next prime is 681769747369. The reversal of 681769747367 is 763747967186.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-681769747367 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 681769747367.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681769747369) 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, 934859 + ... + 1495827.

It is an arithmetic number, because the mean of its divisors is an integer number (45347692860).

Almost surely, 2^681769747367 is an apocalyptic number.

681769747367 is a deficient number, since it is larger than the sum of its proper divisors (43793338393).

681769747367 is a wasteful number, since it uses less digits than its factorization.

681769747367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562042.

The product of its digits is 448084224, while the sum is 71.

The spelling of 681769747367 in words is "six hundred eighty-one billion, seven hundred sixty-nine million, seven hundred forty-seven thousand, three hundred sixty-seven".