1560656640 has 144 divisors (see below), whose sum is σ = 5000179968. Its totient is φ = 414855168.

The previous prime is 1560656639. The next prime is 1560656641. The reversal of 1560656640 is 466560651.

It is an interprime number because it is at equal distance from previous prime (1560656639) and next prime (1560656641).

It is not an unprimeable number, because it can be changed into a prime (1560656641) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2100109 + ... + 2100851.

It is an arithmetic number, because the mean of its divisors is an integer number (34723472).

Almost surely, 2^1560656640 is an apocalyptic number.

1560656640 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 1560656640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2500089984).

1560656640 is an abundant number, since it is smaller than the sum of its proper divisors (3439523328).

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

1560656640 is an equidigital number, since it uses as much as digits as its factorization.

1560656640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1314 (or 1300 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 1560656640 is about 39505.1470064345. The cubic root of 1560656640 is about 1159.9407024782.

The spelling of 1560656640 in words is "one billion, five hundred sixty million, six hundred fifty-six thousand, six hundred forty".