1689511145 has 16 divisors (see below), whose sum is σ = 2396943360. Its totient is φ = 1118572224.

The previous prime is 1689511121. The next prime is 1689511147. The reversal of 1689511145 is 5411159861.

It is a de Polignac number, because none of the positive numbers 2^k-1689511145 is a prime.

It is a super-2 number, since 2×1689511145² = 5708895818158422050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1689511147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 831257 + ... + 833286.

It is an arithmetic number, because the mean of its divisors is an integer number (149808960).

Almost surely, 2^1689511145 is an apocalyptic number.

It is an amenable number.

1689511145 is a deficient number, since it is larger than the sum of its proper divisors (707432215).

1689511145 is a wasteful number, since it uses less digits than its factorization.

1689511145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1664584.

The product of its digits is 43200, while the sum is 41.

The square root of 1689511145 is about 41103.6634012104. The cubic root of 1689511145 is about 1191.0235632380.

The spelling of 1689511145 in words is "one billion, six hundred eighty-nine million, five hundred eleven thousand, one hundred forty-five".