51010660561061 has 4 divisors (see below), whose sum is σ = 52769648856300. Its totient is φ = 49251672265824.

The previous prime is 51010660561057. The next prime is 51010660561073. The reversal of 51010660561061 is 16016506601015.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15116302944961 + 35894357616100 = 3887969^2 + 5991190^2 .

It is a cyclic number.

It is not a de Polignac number, because 51010660561061 - 2² = 51010660561057 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 (51010660560061) 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, 879494147576 + ... + 879494147633.

It is an arithmetic number, because the mean of its divisors is an integer number (13192412214075).

Almost surely, 2^{51010660561061} is an apocalyptic number.

It is an amenable number.

51010660561061 is a deficient number, since it is larger than the sum of its proper divisors (1758988295239).

51010660561061 is a wasteful number, since it uses less digits than its factorization.

51010660561061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1758988295238.

The product of its (nonzero) digits is 32400, while the sum is 38.

The spelling of 51010660561061 in words is "fifty-one trillion, ten billion, six hundred sixty million, five hundred sixty-one thousand, sixty-one".