2804664648691 has 2 divisors, whose sum is σ = 2804664648692. Its totient is φ = 2804664648690.

The previous prime is 2804664648641. The next prime is 2804664648743. The reversal of 2804664648691 is 1968464664082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2804664648691 - 2¹⁹ = 2804664124403 is a prime.

It is a super-2 number, since 2×2804664648691² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2804664648631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1402332324345 + 1402332324346.

It is an arithmetic number, because the mean of its divisors is an integer number (1402332324346).

Almost surely, 2^{2804664648691} is an apocalyptic number.

2804664648691 is a deficient number, since it is larger than the sum of its proper divisors (1).

2804664648691 is an equidigital number, since it uses as much as digits as its factorization.

2804664648691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 95551488, while the sum is 64.

The spelling of 2804664648691 in words is "two trillion, eight hundred four billion, six hundred sixty-four million, six hundred forty-eight thousand, six hundred ninety-one".