1916661652 has 18 divisors (see below), whose sum is σ = 3377455242. Its totient is φ = 951681744.

The previous prime is 1916661641. The next prime is 1916661683. The reversal of 1916661652 is 2561666191.

It can be written as a sum of positive squares in only one way, i.e., 1477172356 + 439489296 = 38434^2 + 20964^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1916661599 and 1916661608.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 1096243 + ... + 1097989.

Almost surely, 2^1916661652 is an apocalyptic number.

It is an amenable number.

1916661652 is a deficient number, since it is larger than the sum of its proper divisors (1460793590).

1916661652 is an equidigital number, since it uses as much as digits as its factorization.

1916661652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3655 (or 1906 counting only the distinct ones).

The product of its digits is 116640, while the sum is 43.

The square root of 1916661652 is about 43779.6945169790. The cubic root of 1916661652 is about 1242.1722356334.

The spelling of 1916661652 in words is "one billion, nine hundred sixteen million, six hundred sixty-one thousand, six hundred fifty-two".