1654661916 has 36 divisors (see below), whose sum is σ = 4203654000. Its totient is φ = 548779968.

The previous prime is 1654661909. The next prime is 1654661933. The reversal of 1654661916 is 6191664561.

1654661916 is a `hidden beast` number, since 16 + 5 + 4 + 6 + 619 + 16 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108321 + ... + 122648.

Almost surely, 2^1654661916 is an apocalyptic number.

It is an amenable number.

1654661916 is an abundant number, since it is smaller than the sum of its proper divisors (2548992084).

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

1654661916 is a wasteful number, since it uses less digits than its factorization.

1654661916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231178 (or 231173 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 1654661916 is about 40677.5357660712. The cubic root of 1654661916 is about 1182.7775982206. Note that the first 3 decimals are identical.

The spelling of 1654661916 in words is "one billion, six hundred fifty-four million, six hundred sixty-one thousand, nine hundred sixteen".