1081663826645 has 8 divisors (see below), whose sum is σ = 1298017457880. Its totient is φ = 865317150720.

The previous prime is 1081663826627. The next prime is 1081663826669. The reversal of 1081663826645 is 5466283661801.

It can be written as a sum of positive squares in 4 ways, for example, as 98873142481 + 982790684164 = 314441^2 + 991358^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1081663826645 - 2³⁴ = 1064483957461 is a prime.

It is a super-2 number, since 2×1081663826645² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1390340 + ... + 2023949.

It is an arithmetic number, because the mean of its divisors is an integer number (162252182235).

Almost surely, 2^{1081663826645} is an apocalyptic number.

It is an amenable number.

1081663826645 is a deficient number, since it is larger than the sum of its proper divisors (216353631235).

1081663826645 is an equidigital number, since it uses as much as digits as its factorization.

1081663826645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3477655.

The product of its (nonzero) digits is 9953280, while the sum is 56.

The spelling of 1081663826645 in words is "one trillion, eighty-one billion, six hundred sixty-three million, eight hundred twenty-six thousand, six hundred forty-five".