2889206561 has 2 divisors, whose sum is σ = 2889206562. Its totient is φ = 2889206560.

The previous prime is 2889206503. The next prime is 2889206587. The reversal of 2889206561 is 1656029882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2158531600 + 730674961 = 46460^2 + 27031^2 .

It is a cyclic number.

It is not a de Polignac number, because 2889206561 - 2²² = 2885012257 is a prime.

It is not a weakly prime, because it can be changed into another prime (2889206591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1444603280 + 1444603281.

It is an arithmetic number, because the mean of its divisors is an integer number (1444603281).

Almost surely, 2^2889206561 is an apocalyptic number.

It is an amenable number.

2889206561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2889206561 is an equidigital number, since it uses as much as digits as its factorization.

2889206561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 414720, while the sum is 47.

The square root of 2889206561 is about 53751.3400856202. The cubic root of 2889206561 is about 1424.2717626719.

The spelling of 2889206561 in words is "two billion, eight hundred eighty-nine million, two hundred six thousand, five hundred sixty-one".