1654648985 has 24 divisors (see below), whose sum is σ = 2195250120. Its totient is φ = 1196349440.

The previous prime is 1654648979. The next prime is 1654648993. The reversal of 1654648985 is 5898464561.

It can be written as a sum of positive squares in 4 ways, for example, as 113379904 + 1541269081 = 10648^2 + 39259^2 .

It is not a de Polignac number, because 1654648985 - 2⁶ = 1654648921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1654648985.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 96761 + ... + 112569.

It is an arithmetic number, because the mean of its divisors is an integer number (91468755).

Almost surely, 2^1654648985 is an apocalyptic number.

It is an amenable number.

1654648985 is a deficient number, since it is larger than the sum of its proper divisors (540601135).

1654648985 is a wasteful number, since it uses less digits than its factorization.

1654648985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16009 (or 15998 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 56.

The square root of 1654648985 is about 40677.3768205375. The cubic root of 1654648985 is about 1182.7745171205.

The spelling of 1654648985 in words is "one billion, six hundred fifty-four million, six hundred forty-eight thousand, nine hundred eighty-five".