651085658189 has 2 divisors, whose sum is σ = 651085658190. Its totient is φ = 651085658188.

The previous prime is 651085658143. The next prime is 651085658207. The reversal of 651085658189 is 981856580156.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 499118229289 + 151967428900 = 706483^2 + 389830^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-651085658189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (651085658989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325542829094 + 325542829095.

It is an arithmetic number, because the mean of its divisors is an integer number (325542829095).

Almost surely, 2^651085658189 is an apocalyptic number.

It is an amenable number.

651085658189 is a deficient number, since it is larger than the sum of its proper divisors (1).

651085658189 is an equidigital number, since it uses as much as digits as its factorization.

651085658189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736000, while the sum is 62.

The spelling of 651085658189 in words is "six hundred fifty-one billion, eighty-five million, six hundred fifty-eight thousand, one hundred eighty-nine".