1681335153 has 12 divisors (see below), whose sum is σ = 2429006580. Its totient is φ = 1120700256.

The previous prime is 1681335151. The next prime is 1681335169. The reversal of 1681335153 is 3515331861.

1681335153 is a `hidden beast` number, since 1 + 6 + 8 + 133 + 515 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 136609344 + 1544725809 = 11688^2 + 39303^2 .

It is not a de Polignac number, because 1681335153 - 2¹ = 1681335151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1681335151) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58783 + ... + 82571.

It is an arithmetic number, because the mean of its divisors is an integer number (202417215).

Almost surely, 2^1681335153 is an apocalyptic number.

It is an amenable number.

1681335153 is a deficient number, since it is larger than the sum of its proper divisors (747671427).

1681335153 is a wasteful number, since it uses less digits than its factorization.

1681335153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31648 (or 31645 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 1681335153 is about 41004.0870280025. The cubic root of 1681335153 is about 1189.0992295926.

The spelling of 1681335153 in words is "one billion, six hundred eighty-one million, three hundred thirty-five thousand, one hundred fifty-three".