650506771601 has 4 divisors (see below), whose sum is σ = 650593733604. Its totient is φ = 650419809600.

The previous prime is 650506771583. The next prime is 650506771619. The reversal of 650506771601 is 106177605056.

It is a Cunningham number, because it is equal to 806540²+1.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (650506771583) and next prime (650506771619).

It can be written as a sum of positive squares in 2 ways, for example, as 564511795600 + 85994976001 = 751340^2 + 293249^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-650506771601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (650506777601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43469780 + ... + 43484741.

It is an arithmetic number, because the mean of its divisors is an integer number (162648433401).

Almost surely, 2^650506771601 is an apocalyptic number.

It is an amenable number.

650506771601 is a deficient number, since it is larger than the sum of its proper divisors (86962003).

650506771601 is an equidigital number, since it uses as much as digits as its factorization.

650506771601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86962002.

The product of its (nonzero) digits is 264600, while the sum is 44.

The spelling of 650506771601 in words is "six hundred fifty billion, five hundred six million, seven hundred seventy-one thousand, six hundred one".