2562961604821 has 2 divisors, whose sum is σ = 2562961604822. Its totient is φ = 2562961604820.

The previous prime is 2562961604803. The next prime is 2562961604843. The reversal of 2562961604821 is 1284061692652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2502882202500 + 60079402321 = 1582050^2 + 245111^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2562961604821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2562961604921) 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, 1281480802410 + 1281480802411.

It is an arithmetic number, because the mean of its divisors is an integer number (1281480802411).

Almost surely, 2^{2562961604821} is an apocalyptic number.

It is an amenable number.

2562961604821 is a deficient number, since it is larger than the sum of its proper divisors (1).

2562961604821 is an equidigital number, since it uses as much as digits as its factorization.

2562961604821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2488320, while the sum is 52.

The spelling of 2562961604821 in words is "two trillion, five hundred sixty-two billion, nine hundred sixty-one million, six hundred four thousand, eight hundred twenty-one".