1681505466 has 32 divisors (see below), whose sum is σ = 3408471360. Its totient is φ = 552945024.

The previous prime is 1681505461. The next prime is 1681505467. The reversal of 1681505466 is 6645051861.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1681505461) 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, 410806 + ... + 414878.

It is an arithmetic number, because the mean of its divisors is an integer number (106514730).

Almost surely, 2^1681505466 is an apocalyptic number.

1681505466 is an abundant number, since it is smaller than the sum of its proper divisors (1726965894).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1681505466 is a wasteful number, since it uses less digits than its factorization.

1681505466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4990.

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 1681505466 is about 41006.1637561965. The cubic root of 1681505466 is about 1189.1393786806.

The spelling of 1681505466 in words is "one billion, six hundred eighty-one million, five hundred five thousand, four hundred sixty-six".