65631454314641 has 4 divisors (see below), whose sum is σ = 65670220680372. Its totient is φ = 65592687948912.

The previous prime is 65631454314631. The next prime is 65631454314659. The reversal of 65631454314641 is 14641345413656.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47481264142225 + 18150190172416 = 6890665^2 + 4260304^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65631454314641 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65631454314631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19383180326 + ... + 19383183711.

It is an arithmetic number, because the mean of its divisors is an integer number (16417555170093).

Almost surely, 2^{65631454314641} is an apocalyptic number.

It is an amenable number.

65631454314641 is a deficient number, since it is larger than the sum of its proper divisors (38766365731).

65631454314641 is a wasteful number, since it uses less digits than its factorization.

65631454314641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38766365730.

The product of its digits is 12441600, while the sum is 53.

The spelling of 65631454314641 in words is "sixty-five trillion, six hundred thirty-one billion, four hundred fifty-four million, three hundred fourteen thousand, six hundred forty-one".