1561316606 has 8 divisors (see below), whose sum is σ = 2344872240. Its totient is φ = 779692528.

The previous prime is 1561316599. The next prime is 1561316623. The reversal of 1561316606 is 6066131651.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 480866 + ... + 484101.

It is an arithmetic number, because the mean of its divisors is an integer number (293109030).

Almost surely, 2^1561316606 is an apocalyptic number.

1561316606 is a deficient number, since it is larger than the sum of its proper divisors (783555634).

1561316606 is an equidigital number, since it uses as much as digits as its factorization.

1561316606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965778.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 1561316606 is about 39513.4990351399. The cubic root of 1561316606 is about 1160.1041835677.

The spelling of 1561316606 in words is "one billion, five hundred sixty-one million, three hundred sixteen thousand, six hundred six".