646515462516499 has 2 divisors, whose sum is σ = 646515462516500. Its totient is φ = 646515462516498.

The previous prime is 646515462516419. The next prime is 646515462516589. The reversal of 646515462516499 is 994615264515646.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 646515462516499 - 2¹⁵ = 646515462483731 is a prime.

It is not a weakly prime, because it can be changed into another prime (646515462516419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323257731258249 + 323257731258250.

It is an arithmetic number, because the mean of its divisors is an integer number (323257731258250).

Almost surely, 2^{646515462516499} is an apocalyptic number.

646515462516499 is a deficient number, since it is larger than the sum of its proper divisors (1).

646515462516499 is an equidigital number, since it uses as much as digits as its factorization.

646515462516499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1679616000, while the sum is 73.

The spelling of 646515462516499 in words is "six hundred forty-six trillion, five hundred fifteen billion, four hundred sixty-two million, five hundred sixteen thousand, four hundred ninety-nine".