1689112505 has 16 divisors (see below), whose sum is σ = 2049960000. Its totient is φ = 1335994560.

The previous prime is 1689112489. The next prime is 1689112517. The reversal of 1689112505 is 5052119861.

It is not a de Polignac number, because 1689112505 - 2⁴ = 1689112489 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 268850 + ... + 275060.

It is an arithmetic number, because the mean of its divisors is an integer number (128122500).

Almost surely, 2^1689112505 is an apocalyptic number.

It is an amenable number.

1689112505 is a deficient number, since it is larger than the sum of its proper divisors (360847495).

1689112505 is a wasteful number, since it uses less digits than its factorization.

1689112505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6824.

The product of its (nonzero) digits is 21600, while the sum is 38.

The square root of 1689112505 is about 41098.8139123260. The cubic root of 1689112505 is about 1190.9298819027.

The spelling of 1689112505 in words is "one billion, six hundred eighty-nine million, one hundred twelve thousand, five hundred five".