1561115606 has 8 divisors (see below), whose sum is σ = 2346563520. Its totient is φ = 778927768.

The previous prime is 1561115579. The next prime is 1561115641. The reversal of 1561115606 is 6065111651.

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

It is a Curzon number.

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, 813821 + ... + 815736.

It is an arithmetic number, because the mean of its divisors is an integer number (293320440).

Almost surely, 2^1561115606 is an apocalyptic number.

1561115606 is a deficient number, since it is larger than the sum of its proper divisors (785447914).

1561115606 is a wasteful number, since it uses less digits than its factorization.

1561115606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1630038.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 1561115606 is about 39510.9555186913. The cubic root of 1561115606 is about 1160.0543984596.

The spelling of 1561115606 in words is "one billion, five hundred sixty-one million, one hundred fifteen thousand, six hundred six".