1561011206044 has 12 divisors (see below), whose sum is σ = 2731796339104. Its totient is φ = 780497966304.

The previous prime is 1561011206011. The next prime is 1561011206119. The reversal of 1561011206044 is 4406021101651.

It is a junction number, because it is equal to n+sod(n) for n = 1561011205997 and 1561011206015.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1436244 + ... + 2277019.

Almost surely, 2^{1561011206044} is an apocalyptic number.

It is an amenable number.

1561011206044 is a deficient number, since it is larger than the sum of its proper divisors (1170785133060).

1561011206044 is a wasteful number, since it uses less digits than its factorization.

1561011206044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3818364 (or 3818362 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

Adding to 1561011206044 its reverse (4406021101651), we get a palindrome (5967032307695).

The spelling of 1561011206044 in words is "one trillion, five hundred sixty-one billion, eleven million, two hundred six thousand, forty-four".