2561983145203 has 2 divisors, whose sum is σ = 2561983145204. Its totient is φ = 2561983145202.

The previous prime is 2561983145153. The next prime is 2561983145257. The reversal of 2561983145203 is 3025413891652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2561983145203 - 2⁹ = 2561983144691 is a prime.

It is a super-2 number, since 2×2561983145203² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2561983145303) 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, 1280991572601 + 1280991572602.

It is an arithmetic number, because the mean of its divisors is an integer number (1280991572602).

Almost surely, 2^{2561983145203} is an apocalyptic number.

2561983145203 is a deficient number, since it is larger than the sum of its proper divisors (1).

2561983145203 is an equidigital number, since it uses as much as digits as its factorization.

2561983145203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1555200, while the sum is 49.

The spelling of 2561983145203 in words is "two trillion, five hundred sixty-one billion, nine hundred eighty-three million, one hundred forty-five thousand, two hundred three".