1916831943009 has 45 divisors (see below), whose sum is σ = 3042096024297. Its totient is φ = 1202585170176.

The previous prime is 1916831943001. The next prime is 1916831943017. The reversal of 1916831943009 is 9003491386191.

The square root of 1916831943009 is 1384497.

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

1916831943009 is a `hidden beast` number, since 1 + 9 + 16 + 8 + 319 + 4 + 300 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (1916831943001) and next prime (1916831943017).

It can be written as a sum of positive squares in 4 ways, for example, as 715335350625 + 1201496592384 = 845775^2 + 1096128^2 .

It is not a de Polignac number, because 1916831943009 - 2³ = 1916831943001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1916831943001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 211823517 + ... + 211832565.

Almost surely, 2^{1916831943009} is an apocalyptic number.

1916831943009 is the 1384497-th square number.

1916831943009 is the 692249-th centered octagonal number.

It is an amenable number.

1916831943009 is a deficient number, since it is larger than the sum of its proper divisors (1125264081288).

1916831943009 is an frugal number, since it uses more digits than its factorization.

1916831943009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18144 (or 9069 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 54.

The spelling of 1916831943009 in words is "one trillion, nine hundred sixteen billion, eight hundred thirty-one million, nine hundred forty-three thousand, nine".