1089023318261 has 2 divisors, whose sum is σ = 1089023318262. Its totient is φ = 1089023318260.

The previous prime is 1089023318239. The next prime is 1089023318297. The reversal of 1089023318261 is 1628133209801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1081847534161 + 7175784100 = 1040119^2 + 84710^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1089023318261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1089023318561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 544511659130 + 544511659131.

It is an arithmetic number, because the mean of its divisors is an integer number (544511659131).

Almost surely, 2^{1089023318261} is an apocalyptic number.

It is an amenable number.

1089023318261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1089023318261 is an equidigital number, since it uses as much as digits as its factorization.

1089023318261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 44.

The spelling of 1089023318261 in words is "one trillion, eighty-nine billion, twenty-three million, three hundred eighteen thousand, two hundred sixty-one".