51061000561 has 8 divisors (see below), whose sum is σ = 51571281600. Its totient is φ = 50550812400.

The previous prime is 51061000559. The next prime is 51061000567. The reversal of 51061000561 is 16500016015.

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

It is a cyclic number.

It is not a de Polignac number, because 51061000561 - 2¹ = 51061000559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51061000567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1761100 + ... + 1789858.

It is an arithmetic number, because the mean of its divisors is an integer number (6446410200).

Almost surely, 2^51061000561 is an apocalyptic number.

It is an amenable number.

51061000561 is a deficient number, since it is larger than the sum of its proper divisors (510281039).

51061000561 is a wasteful number, since it uses less digits than its factorization.

51061000561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46439.

The product of its (nonzero) digits is 900, while the sum is 25.

Adding to 51061000561 its reverse (16500016015), we get a palindrome (67561016576).

The spelling of 51061000561 in words is "fifty-one billion, sixty-one million, five hundred sixty-one", and thus it is an aban number.