51844038689909 has 2 divisors, whose sum is σ = 51844038689910. Its totient is φ = 51844038689908.

The previous prime is 51844038689899. The next prime is 51844038689957. The reversal of 51844038689909 is 90998683044815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51202926206884 + 641112483025 = 7155622^2 + 800695^2 .

It is a cyclic number.

It is not a de Polignac number, because 51844038689909 - 2²⁸ = 51843770254453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51844038689969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25922019344954 + 25922019344955.

It is an arithmetic number, because the mean of its divisors is an integer number (25922019344955).

Almost surely, 2^{51844038689909} is an apocalyptic number.

It is an amenable number.

51844038689909 is a deficient number, since it is larger than the sum of its proper divisors (1).

51844038689909 is an equidigital number, since it uses as much as digits as its factorization.

51844038689909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 537477120, while the sum is 74.

The spelling of 51844038689909 in words is "fifty-one trillion, eight hundred forty-four billion, thirty-eight million, six hundred eighty-nine thousand, nine hundred nine".