65847380631649 has 2 divisors, whose sum is σ = 65847380631650. Its totient is φ = 65847380631648.

The previous prime is 65847380631611. The next prime is 65847380631673. The reversal of 65847380631649 is 94613608374856.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58998989966400 + 6848390665249 = 7681080^2 + 2616943^2 .

It is a cyclic number.

It is not a de Polignac number, because 65847380631649 - 2²⁵ = 65847347077217 is a prime.

It is not a weakly prime, because it can be changed into another prime (65847380631449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32923690315824 + 32923690315825.

It is an arithmetic number, because the mean of its divisors is an integer number (32923690315825).

Almost surely, 2^{65847380631649} is an apocalyptic number.

It is an amenable number.

65847380631649 is a deficient number, since it is larger than the sum of its proper divisors (1).

65847380631649 is an equidigital number, since it uses as much as digits as its factorization.

65847380631649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 627056640, while the sum is 70.

The spelling of 65847380631649 in words is "sixty-five trillion, eight hundred forty-seven billion, three hundred eighty million, six hundred thirty-one thousand, six hundred forty-nine".