1107985706881 has 3 divisors (see below), whose sum is σ = 1107986759491. Its totient is φ = 1107984654272.

The previous prime is 1107985706851. The next prime is 1107985706887. The reversal of 1107985706881 is 1886075897011.

The square root of 1107985706881 is 1052609.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 583404188481 + 524581518400 = 763809^2 + 724280^2 .

It is not a de Polignac number, because 1107985706881 - 2¹³ = 1107985698689 is a prime.

It is a super-2 number, since 2×1107985706881² (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 (1107985706887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 526305 + ... + 1578913.

Almost surely, 2^{1107985706881} is an apocalyptic number.

1107985706881 is the 1052609-th square number.

1107985706881 is the 526305-th centered octagonal number.

It is an amenable number.

1107985706881 is a deficient number, since it is larger than the sum of its proper divisors (1052610).

1107985706881 is an frugal number, since it uses more digits than its factorization.

1107985706881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2105218 (or 1052609 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 61.

The spelling of 1107985706881 in words is "one trillion, one hundred seven billion, nine hundred eighty-five million, seven hundred six thousand, eight hundred eighty-one".