51061013669 has 2 divisors, whose sum is σ = 51061013670. Its totient is φ = 51061013668.

The previous prime is 51061013621. The next prime is 51061013699. The reversal of 51061013669 is 96631016015.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36514241569 + 14546772100 = 191087^2 + 120610^2 .

It is a cyclic number.

It is not a de Polignac number, because 51061013669 - 2²⁰ = 51059965093 is a prime.

It is a super-2 number, since 2×51061013669² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51061013699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25530506834 + 25530506835.

It is an arithmetic number, because the mean of its divisors is an integer number (25530506835).

Almost surely, 2^51061013669 is an apocalyptic number.

It is an amenable number.

51061013669 is a deficient number, since it is larger than the sum of its proper divisors (1).

51061013669 is an equidigital number, since it uses as much as digits as its factorization.

51061013669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 38.

The spelling of 51061013669 in words is "fifty-one billion, sixty-one million, thirteen thousand, six hundred sixty-nine".