1566735648 has 48 divisors (see below), whose sum is σ = 4118304960. Its totient is φ = 521531136.

The previous prime is 1566735641. The next prime is 1566735671. The reversal of 1566735648 is 8465376651.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 1566735648.

It is not an unprimeable number, because it can be changed into a prime (1566735641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61893 + ... + 83451.

It is an arithmetic number, because the mean of its divisors is an integer number (85798020).

Almost surely, 2^1566735648 is an apocalyptic number.

It is an amenable number.

1566735648 is an abundant number, since it is smaller than the sum of its proper divisors (2551569312).

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

1566735648 is a wasteful number, since it uses less digits than its factorization.

1566735648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22329 (or 22321 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 51.

The square root of 1566735648 is about 39582.0116719704. The cubic root of 1566735648 is about 1161.4448029723. Note that the first 3 decimals are identical.

It can be divided in two parts, 15667 and 35648, that added together give a palindrome (51315).

The spelling of 1566735648 in words is "one billion, five hundred sixty-six million, seven hundred thirty-five thousand, six hundred forty-eight".