65525767261 has 2 divisors, whose sum is σ = 65525767262. Its totient is φ = 65525767260.

The previous prime is 65525767231. The next prime is 65525767319. The reversal of 65525767261 is 16276752556.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62135034361 + 3390732900 = 249269^2 + 58230^2 .

It is a cyclic number.

It is not a de Polignac number, because 65525767261 - 2⁷ = 65525767133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65525767199 and 65525767208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65525767211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32762883630 + 32762883631.

It is an arithmetic number, because the mean of its divisors is an integer number (32762883631).

Almost surely, 2^65525767261 is an apocalyptic number.

It is an amenable number.

65525767261 is a deficient number, since it is larger than the sum of its proper divisors (1).

65525767261 is an equidigital number, since it uses as much as digits as its factorization.

65525767261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5292000, while the sum is 52.

The spelling of 65525767261 in words is "sixty-five billion, five hundred twenty-five million, seven hundred sixty-seven thousand, two hundred sixty-one".