1560643842 has 8 divisors (see below), whose sum is σ = 3121287696. Its totient is φ = 520214612.

The previous prime is 1560643813. The next prime is 1560643867. The reversal of 1560643842 is 2483460651.

It is a sphenic number, since it is the product of 3 distinct primes.

1560643842 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 1560643842.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130053648 + ... + 130053659.

It is an arithmetic number, because the mean of its divisors is an integer number (390160962).

Almost surely, 2^1560643842 is an apocalyptic number.

1560643842 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1560643842 is a wasteful number, since it uses less digits than its factorization.

1560643842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260107312.

The product of its (nonzero) digits is 138240, while the sum is 39.

The square root of 1560643842 is about 39504.9850272089. The cubic root of 1560643842 is about 1159.9375318124.

The spelling of 1560643842 in words is "one billion, five hundred sixty million, six hundred forty-three thousand, eight hundred forty-two".