51554269769 has 2 divisors, whose sum is σ = 51554269770. Its totient is φ = 51554269768.

The previous prime is 51554269721. The next prime is 51554269777. The reversal of 51554269769 is 96796245515.

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., 40597414144 + 10956855625 = 201488^2 + 104675^2 .

It is a cyclic number.

It is not a de Polignac number, because 51554269769 - 2²⁰ = 51553221193 is a prime.

It is a super-2 number, since 2×51554269769² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (51554269069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25777134884 + 25777134885.

It is an arithmetic number, because the mean of its divisors is an integer number (25777134885).

Almost surely, 2^51554269769 is an apocalyptic number.

It is an amenable number.

51554269769 is a deficient number, since it is larger than the sum of its proper divisors (1).

51554269769 is an equidigital number, since it uses as much as digits as its factorization.

51554269769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20412000, while the sum is 59.

The spelling of 51554269769 in words is "fifty-one billion, five hundred fifty-four million, two hundred sixty-nine thousand, seven hundred sixty-nine".