1827796190261 has 2 divisors, whose sum is σ = 1827796190262. Its totient is φ = 1827796190260.

The previous prime is 1827796190197. The next prime is 1827796190287. The reversal of 1827796190261 is 1620916977281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1596621780625 + 231174409636 = 1263575^2 + 480806^2 .

It is a cyclic number.

It is not a de Polignac number, because 1827796190261 - 2⁶ = 1827796190197 is a prime.

It is a super-2 number, since 2×1827796190261² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1827796190261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1827796190161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 913898095130 + 913898095131.

It is an arithmetic number, because the mean of its divisors is an integer number (913898095131).

Almost surely, 2^{1827796190261} is an apocalyptic number.

It is an amenable number.

1827796190261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1827796190261 is an equidigital number, since it uses as much as digits as its factorization.

1827796190261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4572288, while the sum is 59.

The spelling of 1827796190261 in words is "one trillion, eight hundred twenty-seven billion, seven hundred ninety-six million, one hundred ninety thousand, two hundred sixty-one".