1630665564 has 96 divisors (see below), whose sum is σ = 4303466496. Its totient is φ = 476287680.

The previous prime is 1630665539. The next prime is 1630665577. The reversal of 1630665564 is 4655660361.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 413707 + ... + 417629.

It is an arithmetic number, because the mean of its divisors is an integer number (44827776).

Almost surely, 2^1630665564 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1630665564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2151733248).

1630665564 is an abundant number, since it is smaller than the sum of its proper divisors (2672800932).

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

1630665564 is a wasteful number, since it uses less digits than its factorization.

1630665564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4055 (or 4053 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 42.

The square root of 1630665564 is about 40381.5002693065. The cubic root of 1630665564 is about 1177.0320807948.

The spelling of 1630665564 in words is "one billion, six hundred thirty million, six hundred sixty-five thousand, five hundred sixty-four".