651271406651 has 2 divisors, whose sum is σ = 651271406652. Its totient is φ = 651271406650.

The previous prime is 651271406647. The next prime is 651271406743. The reversal of 651271406651 is 156604172156.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 651271406651 - 2² = 651271406647 is a prime.

It is not a weakly prime, because it can be changed into another prime (651271400651) 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, 325635703325 + 325635703326.

It is an arithmetic number, because the mean of its divisors is an integer number (325635703326).

Almost surely, 2^651271406651 is an apocalyptic number.

651271406651 is a deficient number, since it is larger than the sum of its proper divisors (1).

651271406651 is an equidigital number, since it uses as much as digits as its factorization.

651271406651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 302400, while the sum is 44.

The spelling of 651271406651 in words is "six hundred fifty-one billion, two hundred seventy-one million, four hundred six thousand, six hundred fifty-one".