650320702561 has 2 divisors, whose sum is σ = 650320702562. Its totient is φ = 650320702560.

The previous prime is 650320702553. The next prime is 650320702631. The reversal of 650320702561 is 165207023056.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 619910574336 + 30410128225 = 787344^2 + 174385^2 .

It is a cyclic number.

It is not a de Polignac number, because 650320702561 - 2³ = 650320702553 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 650320702561.

It is not a weakly prime, because it can be changed into another prime (650320705561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325160351280 + 325160351281.

It is an arithmetic number, because the mean of its divisors is an integer number (325160351281).

Almost surely, 2^650320702561 is an apocalyptic number.

It is an amenable number.

650320702561 is a deficient number, since it is larger than the sum of its proper divisors (1).

650320702561 is an equidigital number, since it uses as much as digits as its factorization.

650320702561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 37.

The spelling of 650320702561 in words is "six hundred fifty billion, three hundred twenty million, seven hundred two thousand, five hundred sixty-one".