65280823261 has 4 divisors (see below), whose sum is σ = 65478046624. Its totient is φ = 65083599900.

The previous prime is 65280823247. The next prime is 65280823271. The reversal of 65280823261 is 16232808256.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65280823261 - 2¹⁹ = 65280298973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65280823271) 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, 98611185 + ... + 98611846.

It is an arithmetic number, because the mean of its divisors is an integer number (16369511656).

Almost surely, 2^65280823261 is an apocalyptic number.

It is an amenable number.

65280823261 is a deficient number, since it is larger than the sum of its proper divisors (197223363).

65280823261 is a wasteful number, since it uses less digits than its factorization.

65280823261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197223362.

The product of its (nonzero) digits is 276480, while the sum is 43.

The spelling of 65280823261 in words is "sixty-five billion, two hundred eighty million, eight hundred twenty-three thousand, two hundred sixty-one".