2606554921 has 2 divisors, whose sum is σ = 2606554922. Its totient is φ = 2606554920.

The previous prime is 2606554807. The next prime is 2606554933. The reversal of 2606554921 is 1294556062.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2586841321 + 19713600 = 50861^2 + 4440^2 .

It is a cyclic number.

It is not a de Polignac number, because 2606554921 - 2¹⁵ = 2606522153 is a prime.

It is not a weakly prime, because it can be changed into another prime (2606554721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1303277460 + 1303277461.

It is an arithmetic number, because the mean of its divisors is an integer number (1303277461).

Almost surely, 2^2606554921 is an apocalyptic number.

It is an amenable number.

2606554921 is a deficient number, since it is larger than the sum of its proper divisors (1).

2606554921 is an equidigital number, since it uses as much as digits as its factorization.

2606554921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 2606554921 is about 51054.4309634335. The cubic root of 2606554921 is about 1376.2234701121.

The spelling of 2606554921 in words is "two billion, six hundred six million, five hundred fifty-four thousand, nine hundred twenty-one".