651450126461 has 2 divisors, whose sum is σ = 651450126462. Its totient is φ = 651450126460.

The previous prime is 651450126449. The next prime is 651450126511. The reversal of 651450126461 is 164621054156.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 619550023225 + 31900103236 = 787115^2 + 178606^2 .

It is a cyclic number.

It is not a de Polignac number, because 651450126461 - 2¹⁰ = 651450125437 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (651450126161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325725063230 + 325725063231.

It is an arithmetic number, because the mean of its divisors is an integer number (325725063231).

Almost surely, 2^651450126461 is an apocalyptic number.

It is an amenable number.

651450126461 is a deficient number, since it is larger than the sum of its proper divisors (1).

651450126461 is an equidigital number, since it uses as much as digits as its factorization.

651450126461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172800, while the sum is 41.

The spelling of 651450126461 in words is "six hundred fifty-one billion, four hundred fifty million, one hundred twenty-six thousand, four hundred sixty-one".