650640636427 has 2 divisors, whose sum is σ = 650640636428. Its totient is φ = 650640636426.

The previous prime is 650640636409. The next prime is 650640636467. The reversal of 650640636427 is 724636046056.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 650640636427 - 2⁷ = 650640636299 is a prime.

It is not a weakly prime, because it can be changed into another prime (650640636407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325320318213 + 325320318214.

It is an arithmetic number, because the mean of its divisors is an integer number (325320318214).

Almost surely, 2^650640636427 is an apocalyptic number.

650640636427 is a deficient number, since it is larger than the sum of its proper divisors (1).

650640636427 is an equidigital number, since it uses as much as digits as its factorization.

650640636427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4354560, while the sum is 49.

The spelling of 650640636427 in words is "six hundred fifty billion, six hundred forty million, six hundred thirty-six thousand, four hundred twenty-seven".