1561073366 has 8 divisors (see below), whose sum is σ = 2363093040. Its totient is φ = 773375688.

The previous prime is 1561073347. The next prime is 1561073377. The reversal of 1561073366 is 6633701651.

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, 3580226 + ... + 3580661.

It is an arithmetic number, because the mean of its divisors is an integer number (295386630).

Almost surely, 2^1561073366 is an apocalyptic number.

1561073366 is a deficient number, since it is larger than the sum of its proper divisors (802019674).

1561073366 is a wasteful number, since it uses less digits than its factorization.

1561073366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7160998.

The product of its (nonzero) digits is 68040, while the sum is 38.

The square root of 1561073366 is about 39510.4209797871. The cubic root of 1561073366 is about 1160.0439356129.

The spelling of 1561073366 in words is "one billion, five hundred sixty-one million, seventy-three thousand, three hundred sixty-six".