1061855984113 has 4 divisors (see below), whose sum is σ = 1061865016740. Its totient is φ = 1061846951488.

The previous prime is 1061855984099. The next prime is 1061855984117. The reversal of 1061855984113 is 3114895581601.

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 453530861809 + 608325122304 = 673447^2 + 779952^2 .

It is a cyclic number.

It is not a de Polignac number, because 1061855984113 - 2²⁹ = 1061319113201 is a prime.

It is a super-2 number, since 2×1061855984113² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1061855984117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4337620 + ... + 4575877.

It is an arithmetic number, because the mean of its divisors is an integer number (265466254185).

Almost surely, 2^{1061855984113} is an apocalyptic number.

It is an amenable number.

1061855984113 is a deficient number, since it is larger than the sum of its proper divisors (9032627).

1061855984113 is an equidigital number, since it uses as much as digits as its factorization.

1061855984113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9032626.

The product of its (nonzero) digits is 1036800, while the sum is 52.

The spelling of 1061855984113 in words is "one trillion, sixty-one billion, eight hundred fifty-five million, nine hundred eighty-four thousand, one hundred thirteen".