53716661729 has 2 divisors, whose sum is σ = 53716661730. Its totient is φ = 53716661728.

The previous prime is 53716661717. The next prime is 53716661783. The reversal of 53716661729 is 92716661735.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28984381504 + 24732280225 = 170248^2 + 157265^2 .

It is a cyclic number.

It is not a de Polignac number, because 53716661729 - 2²⁰ = 53715613153 is a prime.

It is not a weakly prime, because it can be changed into another prime (53716667729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26858330864 + 26858330865.

It is an arithmetic number, because the mean of its divisors is an integer number (26858330865).

Almost surely, 2^53716661729 is an apocalyptic number.

It is an amenable number.

53716661729 is a deficient number, since it is larger than the sum of its proper divisors (1).

53716661729 is an equidigital number, since it uses as much as digits as its factorization.

53716661729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2857680, while the sum is 53.

It can be divided in two parts, 537166 and 61729, that added together give a palindrome (598895).

The spelling of 53716661729 in words is "fifty-three billion, seven hundred sixteen million, six hundred sixty-one thousand, seven hundred twenty-nine".