1089188671381 has 2 divisors, whose sum is σ = 1089188671382. Its totient is φ = 1089188671380.

The previous prime is 1089188671379. The next prime is 1089188671411. The reversal of 1089188671381 is 1831768819801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 901236942225 + 187951729156 = 949335^2 + 433534^2 .

It is a cyclic number.

It is not a de Polignac number, because 1089188671381 - 2¹ = 1089188671379 is a prime.

It is a super-2 number, since 2×1089188671381² (a number of 25 digits) contains 22 as substring.

Together with 1089188671379, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1089188171381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 544594335690 + 544594335691.

It is an arithmetic number, because the mean of its divisors is an integer number (544594335691).

Almost surely, 2^{1089188671381} is an apocalyptic number.

It is an amenable number.

1089188671381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1089188671381 is an equidigital number, since it uses as much as digits as its factorization.

1089188671381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4644864, while the sum is 61.

The spelling of 1089188671381 in words is "one trillion, eighty-nine billion, one hundred eighty-eight million, six hundred seventy-one thousand, three hundred eighty-one".