2644111001801 has 2 divisors, whose sum is σ = 2644111001802. Its totient is φ = 2644111001800.

The previous prime is 2644111001797. The next prime is 2644111001809. The reversal of 2644111001801 is 1081001114462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2608757977225 + 35353024576 = 1615165^2 + 188024^2 .

It is a cyclic number.

It is not a de Polignac number, because 2644111001801 - 2² = 2644111001797 is a prime.

It is not a weakly prime, because it can be changed into another prime (2644111001809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1322055500900 + 1322055500901.

It is an arithmetic number, because the mean of its divisors is an integer number (1322055500901).

Almost surely, 2^{2644111001801} is an apocalyptic number.

It is an amenable number.

2644111001801 is a deficient number, since it is larger than the sum of its proper divisors (1).

2644111001801 is an equidigital number, since it uses as much as digits as its factorization.

2644111001801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 29.

The spelling of 2644111001801 in words is "two trillion, six hundred forty-four billion, one hundred eleven million, one thousand, eight hundred one".