65724259361 has 2 divisors, whose sum is σ = 65724259362. Its totient is φ = 65724259360.

The previous prime is 65724259343. The next prime is 65724259409. The reversal of 65724259361 is 16395242756.

65724259361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33697577761 + 32026681600 = 183569^2 + 178960^2 .

It is a cyclic number.

It is not a de Polignac number, because 65724259361 - 2¹⁰ = 65724258337 is a prime.

It is a super-2 number, since 2×65724259361² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (65724259061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32862129680 + 32862129681.

It is an arithmetic number, because the mean of its divisors is an integer number (32862129681).

Almost surely, 2^65724259361 is an apocalyptic number.

It is an amenable number.

65724259361 is a deficient number, since it is larger than the sum of its proper divisors (1).

65724259361 is an equidigital number, since it uses as much as digits as its factorization.

65724259361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2721600, while the sum is 50.

The spelling of 65724259361 in words is "sixty-five billion, seven hundred twenty-four million, two hundred fifty-nine thousand, three hundred sixty-one".