1641820130 has 16 divisors (see below), whose sum is σ = 2982390840. Its totient is φ = 650702592.

The previous prime is 1641820093. The next prime is 1641820163. The reversal of 1641820130 is 310281461.

It can be written as a sum of positive squares in 4 ways, for example, as 1117364329 + 524455801 = 33427^2 + 22901^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1641820130.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 752039 + ... + 754218.

Almost surely, 2^1641820130 is an apocalyptic number.

1641820130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1641820130 is a deficient number, since it is larger than the sum of its proper divisors (1340570710).

1641820130 is a wasteful number, since it uses less digits than its factorization.

1641820130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1506373.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 1641820130 is about 40519.3796842943. The cubic root of 1641820130 is about 1179.7098132545.

The spelling of 1641820130 in words is "one billion, six hundred forty-one million, eight hundred twenty thousand, one hundred thirty".