65726452637 has 2 divisors, whose sum is σ = 65726452638. Its totient is φ = 65726452636.

The previous prime is 65726452559. The next prime is 65726452663. The reversal of 65726452637 is 73625462756.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64018614361 + 1707838276 = 253019^2 + 41326^2 .

It is a cyclic number.

It is not a de Polignac number, because 65726452637 - 2⁸ = 65726452381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65726454637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32863226318 + 32863226319.

It is an arithmetic number, because the mean of its divisors is an integer number (32863226319).

Almost surely, 2^65726452637 is an apocalyptic number.

It is an amenable number.

65726452637 is a deficient number, since it is larger than the sum of its proper divisors (1).

65726452637 is an equidigital number, since it uses as much as digits as its factorization.

65726452637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12700800, while the sum is 53.

The spelling of 65726452637 in words is "sixty-five billion, seven hundred twenty-six million, four hundred fifty-two thousand, six hundred thirty-seven".