1561610002 has 8 divisors (see below), whose sum is σ = 2364307056. Its totient is φ = 773507652.

The previous prime is 1561609993. The next prime is 1561610003. The reversal of 1561610002 is 2000161651.

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

It is not an unprimeable number, because it can be changed into a prime (1561610003) 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 3 ways as a sum of consecutive naturals, for example, 3648408 + ... + 3648835.

It is an arithmetic number, because the mean of its divisors is an integer number (295538382).

Almost surely, 2^1561610002 is an apocalyptic number.

1561610002 is a deficient number, since it is larger than the sum of its proper divisors (802697054).

1561610002 is a wasteful number, since it uses less digits than its factorization.

1561610002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7297352.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 1561610002 is about 39517.2114653856. The cubic root of 1561610002 is about 1160.1768463037.

Adding to 1561610002 its reverse (2000161651), we get a palindrome (3561771653).

The spelling of 1561610002 in words is "one billion, five hundred sixty-one million, six hundred ten thousand, two".