51056011061 has 4 divisors (see below), whose sum is σ = 55697466624. Its totient is φ = 46414555500.

The previous prime is 51056011049. The next prime is 51056011079. The reversal of 51056011061 is 16011065015.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51056011061 - 2⁶ = 51056010997 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51056011061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51056011661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2320727765 + ... + 2320727786.

It is an arithmetic number, because the mean of its divisors is an integer number (13924366656).

Almost surely, 2^51056011061 is an apocalyptic number.

It is an amenable number.

51056011061 is a deficient number, since it is larger than the sum of its proper divisors (4641455563).

51056011061 is a wasteful number, since it uses less digits than its factorization.

51056011061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4641455562.

The product of its (nonzero) digits is 900, while the sum is 26.

Adding to 51056011061 its reverse (16011065015), we get a palindrome (67067076076).

The spelling of 51056011061 in words is "fifty-one billion, fifty-six million, eleven thousand, sixty-one".