1641040306 has 4 divisors (see below), whose sum is σ = 2461560462. Its totient is φ = 820520152.

The previous prime is 1641040267. The next prime is 1641040309. The reversal of 1641040306 is 6030401461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1463751081 + 177289225 = 38259^2 + 13315^2 .

It is not an unprimeable number, because it can be changed into a prime (1641040309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410260075 + ... + 410260078.

Almost surely, 2^1641040306 is an apocalyptic number.

1641040306 is a deficient number, since it is larger than the sum of its proper divisors (820520156).

1641040306 is an equidigital number, since it uses as much as digits as its factorization.

1641040306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820520155.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 1641040306 is about 40509.7556892164. The cubic root of 1641040306 is about 1179.5230060031.

Adding to 1641040306 its reverse (6030401461), we get a palindrome (7671441767).

The spelling of 1641040306 in words is "one billion, six hundred forty-one million, forty thousand, three hundred six".