1680425090 has 16 divisors (see below), whose sum is σ = 3055950072. Its totient is φ = 665240064.

The previous prime is 1680425077. The next prime is 1680425111. The reversal of 1680425090 is 905240861.

It can be written as a sum of positive squares in 4 ways, for example, as 1051769761 + 628655329 = 32431^2 + 25073^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1680425090.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 865229 + ... + 867168.

Almost surely, 2^1680425090 is an apocalyptic number.

1680425090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1680425090 is a deficient number, since it is larger than the sum of its proper divisors (1375524982).

1680425090 is a wasteful number, since it uses less digits than its factorization.

1680425090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1732501.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 1680425090 is about 40992.9883028793. The cubic root of 1680425090 is about 1188.8846480408.

The spelling of 1680425090 in words is "one billion, six hundred eighty million, four hundred twenty-five thousand, ninety".