1630556660 has 24 divisors (see below), whose sum is σ = 3488778216. Its totient is φ = 639916160.

The previous prime is 1630556647. The next prime is 1630556671. The reversal of 1630556660 is 666550361.

It can be written as a sum of positive squares in 4 ways, for example, as 631617424 + 998939236 = 25132^2 + 31606^2 .

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 7 ways as a sum of consecutive naturals, for example, 768071 + ... + 770190.

It is an arithmetic number, because the mean of its divisors is an integer number (145365759).

Almost surely, 2^1630556660 is an apocalyptic number.

1630556660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1630556660 is an abundant number, since it is smaller than the sum of its proper divisors (1858221556).

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

1630556660 is a wasteful number, since it uses less digits than its factorization.

1630556660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1538323 (or 1538321 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 38.

The square root of 1630556660 is about 40380.1518075403. The cubic root of 1630556660 is about 1177.0058775155.

The spelling of 1630556660 in words is "one billion, six hundred thirty million, five hundred fifty-six thousand, six hundred sixty".