1634221664 has 24 divisors (see below), whose sum is σ = 3235982400. Its totient is φ = 812384896.

The previous prime is 1634221643. The next prime is 1634221703. The reversal of 1634221664 is 4661224361.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142064 + ... + 153135.

It is an arithmetic number, because the mean of its divisors is an integer number (134832600).

Almost surely, 2^1634221664 is an apocalyptic number.

It is an amenable number.

1634221664 is a deficient number, since it is larger than the sum of its proper divisors (1601760736).

1634221664 is a wasteful number, since it uses less digits than its factorization.

1634221664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295382 (or 295374 counting only the distinct ones).

The product of its digits is 41472, while the sum is 35.

The square root of 1634221664 is about 40425.5075911237. The cubic root of 1634221664 is about 1177.8870700947.

The spelling of 1634221664 in words is "one billion, six hundred thirty-four million, two hundred twenty-one thousand, six hundred sixty-four".