651605616073 has 2 divisors, whose sum is σ = 651605616074. Its totient is φ = 651605616072.

The previous prime is 651605616043. The next prime is 651605616157. The reversal of 651605616073 is 370616506156.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 523840117824 + 127765498249 = 723768^2 + 357443^2 .

It is a cyclic number.

It is not a de Polignac number, because 651605616073 - 2²⁹ = 651068745161 is a prime.

It is not a weakly prime, because it can be changed into another prime (651605616043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325802808036 + 325802808037.

It is an arithmetic number, because the mean of its divisors is an integer number (325802808037).

Almost surely, 2^651605616073 is an apocalyptic number.

It is an amenable number.

651605616073 is a deficient number, since it is larger than the sum of its proper divisors (1).

651605616073 is an equidigital number, since it uses as much as digits as its factorization.

651605616073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 680400, while the sum is 46.

The spelling of 651605616073 in words is "six hundred fifty-one billion, six hundred five million, six hundred sixteen thousand, seventy-three".