51161350061 has 16 divisors (see below), whose sum is σ = 54171248640. Its totient is φ = 48245639040.

The previous prime is 51161350033. The next prime is 51161350091. The reversal of 51161350061 is 16005316115.

It is a cyclic number.

It is not a de Polignac number, because 51161350061 - 2⁶ = 51161349997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51161350001) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 256985 + ... + 410321.

It is an arithmetic number, because the mean of its divisors is an integer number (3385703040).

Almost surely, 2^51161350061 is an apocalyptic number.

It is an amenable number.

51161350061 is a deficient number, since it is larger than the sum of its proper divisors (3009898579).

51161350061 is a wasteful number, since it uses less digits than its factorization.

51161350061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153644.

The product of its (nonzero) digits is 2700, while the sum is 29.

Adding to 51161350061 its reverse (16005316115), we get a palindrome (67166666176).

The spelling of 51161350061 in words is "fifty-one billion, one hundred sixty-one million, three hundred fifty thousand, sixty-one".