1641679808 has 14 divisors (see below), whose sum is σ = 3257708496. Its totient is φ = 820839872.

The previous prime is 1641679801. The next prime is 1641679813. The reversal of 1641679808 is 8089761461.

It is a super-2 number, since 2×1641679808² = 5390225183989833728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641679801) 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, 12825560 + ... + 12825687.

It is an arithmetic number, because the mean of its divisors is an integer number (232693464).

Almost surely, 2^1641679808 is an apocalyptic number.

It is an amenable number.

1641679808 is a deficient number, since it is larger than the sum of its proper divisors (1616028688).

1641679808 is an equidigital number, since it uses as much as digits as its factorization.

1641679808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25651259 (or 25651249 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 50.

The square root of 1641679808 is about 40517.6481054861. The cubic root of 1641679808 is about 1179.6762034103.

The spelling of 1641679808 in words is "one billion, six hundred forty-one million, six hundred seventy-nine thousand, eight hundred eight".