1801662916 has 27 divisors (see below), whose sum is σ = 3330568269. Its totient is φ = 852655248.

The previous prime is 1801662911. The next prime is 1801662931. The reversal of 1801662916 is 6192661081.

The square root of 1801662916 is 42446.

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

It can be written as a sum of positive squares in only one way, i.e., 79744900 + 1721918016 = 8930^2 + 41496^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1801662911) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1612390 + ... + 1613506.

Almost surely, 2^1801662916 is an apocalyptic number.

1801662916 is the 42446-th square number.

It is an amenable number.

1801662916 is a deficient number, since it is larger than the sum of its proper divisors (1528905353).

1801662916 is an equidigital number, since it uses as much as digits as its factorization.

1801662916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2276 (or 1138 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 40.

The cubic root of 1801662916 is about 1216.8148834840.

The spelling of 1801662916 in words is "one billion, eight hundred one million, six hundred sixty-two thousand, nine hundred sixteen".