1081988343245 has 4 divisors (see below), whose sum is σ = 1298386011900. Its totient is φ = 865590674592.

The previous prime is 1081988343229. The next prime is 1081988343251. The reversal of 1081988343245 is 5423438891801.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 507089258404 + 574899084841 = 712102^2 + 758221^2 .

It is a cyclic number.

It is not a de Polignac number, because 1081988343245 - 2⁴ = 1081988343229 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108198834320 + ... + 108198834329.

It is an arithmetic number, because the mean of its divisors is an integer number (324596502975).

Almost surely, 2^{1081988343245} is an apocalyptic number.

It is an amenable number.

1081988343245 is a deficient number, since it is larger than the sum of its proper divisors (216397668655).

1081988343245 is an equidigital number, since it uses as much as digits as its factorization.

1081988343245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216397668654.

The product of its (nonzero) digits is 6635520, while the sum is 56.

The spelling of 1081988343245 in words is "one trillion, eighty-one billion, nine hundred eighty-eight million, three hundred forty-three thousand, two hundred forty-five".