1688605145 has 32 divisors (see below), whose sum is σ = 2242356480. Its totient is φ = 1214991360.

The previous prime is 1688605133. The next prime is 1688605153. The reversal of 1688605145 is 5415068861.

It is not a de Polignac number, because 1688605145 - 2⁴ = 1688605129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1688605096 and 1688605105.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 296525 + ... + 302165.

It is an arithmetic number, because the mean of its divisors is an integer number (70073640).

Almost surely, 2^1688605145 is an apocalyptic number.

It is an amenable number.

1688605145 is a deficient number, since it is larger than the sum of its proper divisors (553751335).

1688605145 is a wasteful number, since it uses less digits than its factorization.

1688605145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5825.

The product of its (nonzero) digits is 230400, while the sum is 44.

The square root of 1688605145 is about 41092.6410078496. The cubic root of 1688605145 is about 1190.8106297923.

The spelling of 1688605145 in words is "one billion, six hundred eighty-eight million, six hundred five thousand, one hundred forty-five".