650261865553 has 2 divisors, whose sum is σ = 650261865554. Its totient is φ = 650261865552.

The previous prime is 650261865503. The next prime is 650261865569. The reversal of 650261865553 is 355568162056.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 534051100944 + 116210764609 = 730788^2 + 340897^2 .

It is a cyclic number.

It is not a de Polignac number, because 650261865553 - 2¹⁷ = 650261734481 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 650261865553.

It is not a weakly prime, because it can be changed into another prime (650261865503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325130932776 + 325130932777.

It is an arithmetic number, because the mean of its divisors is an integer number (325130932777).

Almost surely, 2^650261865553 is an apocalyptic number.

It is an amenable number.

650261865553 is a deficient number, since it is larger than the sum of its proper divisors (1).

650261865553 is an equidigital number, since it uses as much as digits as its factorization.

650261865553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480000, while the sum is 52.

The spelling of 650261865553 in words is "six hundred fifty billion, two hundred sixty-one million, eight hundred sixty-five thousand, five hundred fifty-three".