2191648801 has 2 divisors, whose sum is σ = 2191648802. Its totient is φ = 2191648800.

The previous prime is 2191648783. The next prime is 2191648831. The reversal of 2191648801 is 1088461912.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2125210000 + 66438801 = 46100^2 + 8151^2 .

It is a cyclic number.

It is not a de Polignac number, because 2191648801 - 2¹¹ = 2191646753 is a prime.

It is not a weakly prime, because it can be changed into another prime (2191648831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1095824400 + 1095824401.

It is an arithmetic number, because the mean of its divisors is an integer number (1095824401).

Almost surely, 2^2191648801 is an apocalyptic number.

It is an amenable number.

2191648801 is a deficient number, since it is larger than the sum of its proper divisors (1).

2191648801 is an equidigital number, since it uses as much as digits as its factorization.

2191648801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 40.

The square root of 2191648801 is about 46815.0488731989. The cubic root of 2191648801 is about 1298.9436785997.

The spelling of 2191648801 in words is "two billion, one hundred ninety-one million, six hundred forty-eight thousand, eight hundred one".