1608135108481 has 4 divisors (see below), whose sum is σ = 1754329209264. Its totient is φ = 1461941007700.

The previous prime is 1608135108439. The next prime is 1608135108497. The reversal of 1608135108481 is 1848015318061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1608135108481 - 2¹⁷ = 1608134977409 is a prime.

It is a super-2 number, since 2×1608135108481² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1608138108481) 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, 73097050375 + ... + 73097050396.

It is an arithmetic number, because the mean of its divisors is an integer number (438582302316).

Almost surely, 2^{1608135108481} is an apocalyptic number.

1608135108481 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1608135108481 is a deficient number, since it is larger than the sum of its proper divisors (146194100783).

1608135108481 is a wasteful number, since it uses less digits than its factorization.

1608135108481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146194100782.

The product of its (nonzero) digits is 184320, while the sum is 46.

The spelling of 1608135108481 in words is "one trillion, six hundred eight billion, one hundred thirty-five million, one hundred eight thousand, four hundred eighty-one".