650506777601 has 2 divisors, whose sum is σ = 650506777602. Its totient is φ = 650506777600.

The previous prime is 650506777589. The next prime is 650506777643. The reversal of 650506777601 is 106777605056.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 609398809600 + 41107968001 = 780640^2 + 202751^2 .

It is a cyclic number.

It is not a de Polignac number, because 650506777601 - 2²⁶ = 650439668737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 650506777601.

It is not a weakly prime, because it can be changed into another prime (650506777681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325253388800 + 325253388801.

It is an arithmetic number, because the mean of its divisors is an integer number (325253388801).

Almost surely, 2^650506777601 is an apocalyptic number.

It is an amenable number.

650506777601 is a deficient number, since it is larger than the sum of its proper divisors (1).

650506777601 is an equidigital number, since it uses as much as digits as its factorization.

650506777601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1852200, while the sum is 50.

The spelling of 650506777601 in words is "six hundred fifty billion, five hundred six million, seven hundred seventy-seven thousand, six hundred one".