53665553129 has 2 divisors, whose sum is σ = 53665553130. Its totient is φ = 53665553128.

The previous prime is 53665553119. The next prime is 53665553159. The reversal of 53665553129 is 92135556635.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51672109225 + 1993443904 = 227315^2 + 44648^2 .

It is a cyclic number.

It is not a de Polignac number, because 53665553129 - 2²⁴ = 53648775913 is a prime.

It is not a weakly prime, because it can be changed into another prime (53665553119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26832776564 + 26832776565.

It is an arithmetic number, because the mean of its divisors is an integer number (26832776565).

Almost surely, 2^53665553129 is an apocalyptic number.

It is an amenable number.

53665553129 is a deficient number, since it is larger than the sum of its proper divisors (1).

53665553129 is an equidigital number, since it uses as much as digits as its factorization.

53665553129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3645000, while the sum is 50.

The spelling of 53665553129 in words is "fifty-three billion, six hundred sixty-five million, five hundred fifty-three thousand, one hundred twenty-nine".