2223821701649 has 2 divisors, whose sum is σ = 2223821701650. Its totient is φ = 2223821701648.

The previous prime is 2223821701561. The next prime is 2223821701657. The reversal of 2223821701649 is 9461071283222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1990525939600 + 233295762049 = 1410860^2 + 483007^2 .

It is a cyclic number.

It is not a de Polignac number, because 2223821701649 - 2⁸ = 2223821701393 is a prime.

It is not a weakly prime, because it can be changed into another prime (2223821700649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1111910850824 + 1111910850825.

It is an arithmetic number, because the mean of its divisors is an integer number (1111910850825).

Almost surely, 2^{2223821701649} is an apocalyptic number.

It is an amenable number.

2223821701649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2223821701649 is an equidigital number, since it uses as much as digits as its factorization.

2223821701649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 580608, while the sum is 47.

The spelling of 2223821701649 in words is "two trillion, two hundred twenty-three billion, eight hundred twenty-one million, seven hundred one thousand, six hundred forty-nine".