2890564193261 has 2 divisors, whose sum is σ = 2890564193262. Its totient is φ = 2890564193260.

The previous prime is 2890564193227. The next prime is 2890564193269. The reversal of 2890564193261 is 1623914650982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2806981914025 + 83582279236 = 1675405^2 + 289106^2 .

It is a cyclic number.

It is not a de Polignac number, because 2890564193261 - 2⁶ = 2890564193197 is a prime.

It is a super-2 number, since 2×2890564193261² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2890564193197 and 2890564193206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2890564193269) 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, 1445282096630 + 1445282096631.

It is an arithmetic number, because the mean of its divisors is an integer number (1445282096631).

Almost surely, 2^{2890564193261} is an apocalyptic number.

It is an amenable number.

2890564193261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2890564193261 is an equidigital number, since it uses as much as digits as its factorization.

2890564193261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5598720, while the sum is 56.

The spelling of 2890564193261 in words is "two trillion, eight hundred ninety billion, five hundred sixty-four million, one hundred ninety-three thousand, two hundred sixty-one".