1608578671 has 4 divisors (see below), whose sum is σ = 1838375632. Its totient is φ = 1378781712.

The previous prime is 1608578659. The next prime is 1608578687. The reversal of 1608578671 is 1768758061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1768758061 = 7 ⋅252679723.

It is not a de Polignac number, because 1608578671 - 2⁹ = 1608578159 is a prime.

It is a super-2 number, since 2×1608578671² = 5175050681592252482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1608578371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114898470 + ... + 114898483.

It is an arithmetic number, because the mean of its divisors is an integer number (459593908).

Almost surely, 2^1608578671 is an apocalyptic number.

1608578671 is a deficient number, since it is larger than the sum of its proper divisors (229796961).

1608578671 is an equidigital number, since it uses as much as digits as its factorization.

1608578671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229796960.

The product of its (nonzero) digits is 564480, while the sum is 49.

The square root of 1608578671 is about 40107.0900340576. The cubic root of 1608578671 is about 1171.6937193018.

The spelling of 1608578671 in words is "one billion, six hundred eight million, five hundred seventy-eight thousand, six hundred seventy-one".