1664745615011 has 2 divisors, whose sum is σ = 1664745615012. Its totient is φ = 1664745615010.

The previous prime is 1664745614989. The next prime is 1664745615037. The reversal of 1664745615011 is 1105165474661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1664745615011 - 2³⁰ = 1663671873187 is a prime.

It is not a weakly prime, because it can be changed into another prime (1664745605011) 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, 832372807505 + 832372807506.

It is an arithmetic number, because the mean of its divisors is an integer number (832372807506).

Almost surely, 2^{1664745615011} is an apocalyptic number.

1664745615011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1664745615011 is an equidigital number, since it uses as much as digits as its factorization.

1664745615011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 604800, while the sum is 47.

The spelling of 1664745615011 in words is "one trillion, six hundred sixty-four billion, seven hundred forty-five million, six hundred fifteen thousand, eleven".