65281647773 has 2 divisors, whose sum is σ = 65281647774. Its totient is φ = 65281647772.

The previous prime is 65281647727. The next prime is 65281647869. The reversal of 65281647773 is 37774618256.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65281272004 + 375769 = 255502^2 + 613^2 .

It is a cyclic number.

It is not a de Polignac number, because 65281647773 - 2³² = 60986680477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65281647713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32640823886 + 32640823887.

It is an arithmetic number, because the mean of its divisors is an integer number (32640823887).

Almost surely, 2^65281647773 is an apocalyptic number.

It is an amenable number.

65281647773 is a deficient number, since it is larger than the sum of its proper divisors (1).

65281647773 is an equidigital number, since it uses as much as digits as its factorization.

65281647773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11854080, while the sum is 56.

The spelling of 65281647773 in words is "sixty-five billion, two hundred eighty-one million, six hundred forty-seven thousand, seven hundred seventy-three".