65239887241 has 9 divisors (see below), whose sum is σ = 65684504781. Its totient is φ = 64798264332.

The previous prime is 65239887217. The next prime is 65239887247. The reversal of 65239887241 is 14278893256.

The square root of 65239887241 is 255421.

It is a perfect power (a square), and thus also a powerful number.

65239887241 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 65239887241 - 2¹⁹ = 65239362953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65239887247) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 41632840 + ... + 41634406.

It is an arithmetic number, because the mean of its divisors is an integer number (7298278309).

Almost surely, 2^65239887241 is an apocalyptic number.

65239887241 is the 255421-st square number.

65239887241 is the 127711-st centered octagonal number.

It is an amenable number.

65239887241 is a deficient number, since it is larger than the sum of its proper divisors (444617540).

65239887241 is an frugal number, since it uses more digits than its factorization.

65239887241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3460 (or 1730 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 55.

The spelling of 65239887241 in words is "sixty-five billion, two hundred thirty-nine million, eight hundred eighty-seven thousand, two hundred forty-one".