1641819908 has 12 divisors (see below), whose sum is σ = 2943262812. Its totient is φ = 800887680.

The previous prime is 1641819889. The next prime is 1641819913. The reversal of 1641819908 is 8099181461.

It can be written as a sum of positive squares in 2 ways, for example, as 765186244 + 876633664 = 27662^2 + 29608^2 .

It is a super-2 number, since 2×1641819908² = 5391145220610256928, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5005385 + ... + 5005712.

It is an arithmetic number, because the mean of its divisors is an integer number (245271901).

Almost surely, 2^1641819908 is an apocalyptic number.

It is an amenable number.

1641819908 is a deficient number, since it is larger than the sum of its proper divisors (1301442904).

1641819908 is a wasteful number, since it uses less digits than its factorization.

1641819908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10011142 (or 10011140 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 47.

The square root of 1641819908 is about 40519.3769448643. The cubic root of 1641819908 is about 1179.7097600827.

The spelling of 1641819908 in words is "one billion, six hundred forty-one million, eight hundred nineteen thousand, nine hundred eight".