680287982461 has 2 divisors, whose sum is σ = 680287982462. Its totient is φ = 680287982460.

The previous prime is 680287982453. The next prime is 680287982537. The reversal of 680287982461 is 164289782086.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 625255514361 + 55032468100 = 790731^2 + 234590^2 .

It is a cyclic number.

It is not a de Polignac number, because 680287982461 - 2³ = 680287982453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 680287982461.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680287982401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340143991230 + 340143991231.

It is an arithmetic number, because the mean of its divisors is an integer number (340143991231).

Almost surely, 2^680287982461 is an apocalyptic number.

It is an amenable number.

680287982461 is a deficient number, since it is larger than the sum of its proper divisors (1).

680287982461 is an equidigital number, since it uses as much as digits as its factorization.

680287982461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18579456, while the sum is 61.

The spelling of 680287982461 in words is "six hundred eighty billion, two hundred eighty-seven million, nine hundred eighty-two thousand, four hundred sixty-one".