2642220641 has 2 divisors, whose sum is σ = 2642220642. Its totient is φ = 2642220640.

The previous prime is 2642220583. The next prime is 2642220661. The reversal of 2642220641 is 1460222462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2469692416 + 172528225 = 49696^2 + 13135^2 .

It is a cyclic number.

It is not a de Polignac number, because 2642220641 - 2⁶ = 2642220577 is a prime.

It is not a weakly prime, because it can be changed into another prime (2642220661) 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, 1321110320 + 1321110321.

It is an arithmetic number, because the mean of its divisors is an integer number (1321110321).

Almost surely, 2^2642220641 is an apocalyptic number.

It is an amenable number.

2642220641 is a deficient number, since it is larger than the sum of its proper divisors (1).

2642220641 is an equidigital number, since it uses as much as digits as its factorization.

2642220641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 2642220641 is about 51402.5353557585. The cubic root of 2642220641 is about 1382.4720517727.

The spelling of 2642220641 in words is "two billion, six hundred forty-two million, two hundred twenty thousand, six hundred forty-one".