51764500909109 has 2 divisors, whose sum is σ = 51764500909110. Its totient is φ = 51764500909108.

The previous prime is 51764500909063. The next prime is 51764500909123. The reversal of 51764500909109 is 90190900546715.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29697290028484 + 22067210880625 = 5449522^2 + 4697575^2 .

It is a cyclic number.

It is not a de Polignac number, because 51764500909109 - 2⁴⁴ = 34172314864693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51764500909409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25882250454554 + 25882250454555.

It is an arithmetic number, because the mean of its divisors is an integer number (25882250454555).

Almost surely, 2^{51764500909109} is an apocalyptic number.

It is an amenable number.

51764500909109 is a deficient number, since it is larger than the sum of its proper divisors (1).

51764500909109 is an equidigital number, since it uses as much as digits as its factorization.

51764500909109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3061800, while the sum is 56.

The spelling of 51764500909109 in words is "fifty-one trillion, seven hundred sixty-four billion, five hundred million, nine hundred nine thousand, one hundred nine".