681192765 has 24 divisors (see below), whose sum is σ = 1288074528. Its totient is φ = 330275040.

The previous prime is 681192763. The next prime is 681192797. The reversal of 681192765 is 567291186.

681192765 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 681192765 - 2¹ = 681192763 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 681192765.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681192763) 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, 687579 + ... + 688568.

It is an arithmetic number, because the mean of its divisors is an integer number (53669772).

Almost surely, 2^681192765 is an apocalyptic number.

It is an amenable number.

681192765 is a deficient number, since it is larger than the sum of its proper divisors (606881763).

681192765 is a wasteful number, since it uses less digits than its factorization.

681192765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1376169 (or 1376166 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 681192765 is about 26099.6698254978. The cubic root of 681192765 is about 879.8797894509.

The spelling of 681192765 in words is "six hundred eighty-one million, one hundred ninety-two thousand, seven hundred sixty-five".