1608185641 has 2 divisors, whose sum is σ = 1608185642. Its totient is φ = 1608185640.

The previous prime is 1608185629. The next prime is 1608185701. The reversal of 1608185641 is 1465818061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1239392025 + 368793616 = 35205^2 + 19204^2 .

It is a cyclic number.

It is not a de Polignac number, because 1608185641 - 2⁵ = 1608185609 is a prime.

It is a super-2 number, since 2×1608185641² = 5172522111837161762, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1608185594 and 1608185603.

It is not a weakly prime, because it can be changed into another prime (1608185611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 804092820 + 804092821.

It is an arithmetic number, because the mean of its divisors is an integer number (804092821).

Almost surely, 2^1608185641 is an apocalyptic number.

It is an amenable number.

1608185641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1608185641 is an equidigital number, since it uses as much as digits as its factorization.

1608185641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46080, while the sum is 40.

The square root of 1608185641 is about 40102.1899776060. The cubic root of 1608185641 is about 1171.5982834362.

The spelling of 1608185641 in words is "one billion, six hundred eight million, one hundred eighty-five thousand, six hundred forty-one".