51061005561051 has 8 divisors (see below), whose sum is σ = 75645934164560. Its totient is φ = 34040670374016.

The previous prime is 51061005561031. The next prime is 51061005561073. The reversal of 51061005561051 is 15016550016015.

It is a happy number.

51061005561051 is a `hidden beast` number, since 51 + 0 + 6 + 1 + 0 + 0 + 556 + 1 + 0 + 51 = 666.

It is not a de Polignac number, because 51061005561051 - 2¹⁰ = 51061005560027 is a prime.

It is a super-2 number, since 2×51061005561051² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51061005560997 and 51061005561015.

It is not an unprimeable number, because it can be changed into a prime (51061005561031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 945574177030 + ... + 945574177083.

It is an arithmetic number, because the mean of its divisors is an integer number (9455741770570).

Almost surely, 2^{51061005561051} is an apocalyptic number.

51061005561051 is a deficient number, since it is larger than the sum of its proper divisors (24584928603509).

51061005561051 is a wasteful number, since it uses less digits than its factorization.

51061005561051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1891148354122 (or 1891148354116 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 36.

Adding to 51061005561051 its reverse (15016550016015), we get a palindrome (66077555577066).

The spelling of 51061005561051 in words is "fifty-one trillion, sixty-one billion, five million, five hundred sixty-one thousand, fifty-one".