1641000002 has 4 divisors (see below), whose sum is σ = 2461500006. Its totient is φ = 820500000.

The previous prime is 1640999963. The next prime is 1641000007. The reversal of 1641000002 is 2000001461.

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., 1630625161 + 10374841 = 40381^2 + 3221^2 .

It is not an unprimeable number, because it can be changed into a prime (1641000007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410249999 + ... + 410250002.

Almost surely, 2^1641000002 is an apocalyptic number.

1641000002 is a deficient number, since it is larger than the sum of its proper divisors (820500004).

1641000002 is an equidigital number, since it uses as much as digits as its factorization.

1641000002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820500003.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1641000002 is about 40509.2582257439. The cubic root of 1641000002 is about 1179.5133495504.

Adding to 1641000002 its reverse (2000001461), we get a palindrome (3641001463).

The spelling of 1641000002 in words is "one billion, six hundred forty-one million, two", and thus it is an aban number.