1560661650560 has 128 divisors (see below), whose sum is σ = 3809687698800. Its totient is φ = 611216326656.

The previous prime is 1560661650553. The next prime is 1560661650577. The reversal of 1560661650560 is 650561660651.

It can be written as a sum of positive squares in 8 ways, for example, as 309109312576 + 1251552337984 = 555976^2 + 1118728^2 .

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6278726 + ... + 6522554.

Almost surely, 2^{1560661650560} is an apocalyptic number.

1560661650560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1560661650560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1904843849400).

1560661650560 is an abundant number, since it is smaller than the sum of its proper divisors (2249026048240).

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

1560661650560 is a wasteful number, since it uses less digits than its factorization.

1560661650560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244058 (or 244046 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 47.

The spelling of 1560661650560 in words is "one trillion, five hundred sixty billion, six hundred sixty-one million, six hundred fifty thousand, five hundred sixty".