651560011601 has 4 divisors (see below), whose sum is σ = 651689783604. Its totient is φ = 651430239600.

The previous prime is 651560011549. The next prime is 651560011643. The reversal of 651560011601 is 106110065156.

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

It can be written as a sum of positive squares in 2 ways, for example, as 633870745600 + 17689266001 = 796160^2 + 133001^2 .

It is a cyclic number.

It is not a de Polignac number, because 651560011601 - 2²⁶ = 651492902737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (651560011691) 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 in 3 ways as a sum of consecutive naturals, for example, 64878470 + ... + 64888511.

It is an arithmetic number, because the mean of its divisors is an integer number (162922445901).

Almost surely, 2^651560011601 is an apocalyptic number.

It is an amenable number.

651560011601 is a deficient number, since it is larger than the sum of its proper divisors (129772003).

651560011601 is a wasteful number, since it uses less digits than its factorization.

651560011601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129772002.

The product of its (nonzero) digits is 5400, while the sum is 32.

Adding to 651560011601 its reverse (106110065156), we get a palindrome (757670076757).

The spelling of 651560011601 in words is "six hundred fifty-one billion, five hundred sixty million, eleven thousand, six hundred one".