51876745409 has 2 divisors, whose sum is σ = 51876745410. Its totient is φ = 51876745408.

The previous prime is 51876745373. The next prime is 51876745517. The reversal of 51876745409 is 90454767815.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40148938384 + 11727807025 = 200372^2 + 108295^2 .

It is a cyclic number.

It is not a de Polignac number, because 51876745409 - 2¹² = 51876741313 is a prime.

It is not a weakly prime, because it can be changed into another prime (51876775409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25938372704 + 25938372705.

It is an arithmetic number, because the mean of its divisors is an integer number (25938372705).

Almost surely, 2^51876745409 is an apocalyptic number.

It is an amenable number.

51876745409 is a deficient number, since it is larger than the sum of its proper divisors (1).

51876745409 is an equidigital number, since it uses as much as digits as its factorization.

51876745409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8467200, while the sum is 56.

The spelling of 51876745409 in words is "fifty-one billion, eight hundred seventy-six million, seven hundred forty-five thousand, four hundred nine".