65244773081661 has 32 divisors (see below), whose sum is σ = 94902275680128. Its totient is φ = 39708547676160.

The previous prime is 65244773081629. The next prime is 65244773081681. The reversal of 65244773081661 is 16618037744256.

It is not a de Polignac number, because 65244773081661 - 2⁵ = 65244773081629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65244773081595 and 65244773081604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65244773081681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89819371 + ... + 90542856.

It is an arithmetic number, because the mean of its divisors is an integer number (2965696115004).

Almost surely, 2^{65244773081661} is an apocalyptic number.

It is an amenable number.

65244773081661 is a deficient number, since it is larger than the sum of its proper divisors (29657502598467).

65244773081661 is a wasteful number, since it uses less digits than its factorization.

65244773081661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180362461.

The product of its (nonzero) digits is 40642560, while the sum is 60.

The spelling of 65244773081661 in words is "sixty-five trillion, two hundred forty-four billion, seven hundred seventy-three million, eighty-one thousand, six hundred sixty-one".