1080197585261 has 2 divisors, whose sum is σ = 1080197585262. Its totient is φ = 1080197585260.

The previous prime is 1080197585251. The next prime is 1080197585263. The reversal of 1080197585261 is 1625857910801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 861425296900 + 218772288361 = 928130^2 + 467731^2 .

It is an emirp because it is prime and its reverse (1625857910801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1080197585261 - 2³⁰ = 1079123843437 is a prime.

Together with 1080197585263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1080197585263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540098792630 + 540098792631.

It is an arithmetic number, because the mean of its divisors is an integer number (540098792631).

Almost surely, 2^{1080197585261} is an apocalyptic number.

It is an amenable number.

1080197585261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1080197585261 is an equidigital number, since it uses as much as digits as its factorization.

1080197585261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1209600, while the sum is 53.

The spelling of 1080197585261 in words is "one trillion, eighty billion, one hundred ninety-seven million, five hundred eighty-five thousand, two hundred sixty-one".