680750380845 has 12 divisors (see below), whose sum is σ = 1179967326876. Its totient is φ = 363066869760.

The previous prime is 680750380841. The next prime is 680750380861. The reversal of 680750380845 is 548083057086.

It can be written as a sum of positive squares in 2 ways, for example, as 470050102404 + 210700278441 = 685602^2 + 459021^2 .

It is not a de Polignac number, because 680750380845 - 2² = 680750380841 is a prime.

It is a super-2 number, since 2×680750380845² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 680750380791 and 680750380800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680750380841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7563893076 + ... + 7563893165.

It is an arithmetic number, because the mean of its divisors is an integer number (98330610573).

Almost surely, 2^680750380845 is an apocalyptic number.

It is an amenable number.

680750380845 is a deficient number, since it is larger than the sum of its proper divisors (499216946031).

680750380845 is a wasteful number, since it uses less digits than its factorization.

680750380845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15127786252 (or 15127786249 counting only the distinct ones).

The product of its (nonzero) digits is 6451200, while the sum is 54.

The spelling of 680750380845 in words is "six hundred eighty billion, seven hundred fifty million, three hundred eighty thousand, eight hundred forty-five".