65411233437221 has 16 divisors (see below), whose sum is σ = 74941439193600. Its totient is φ = 55927492709760.

The previous prime is 65411233437161. The next prime is 65411233437239. The reversal of 65411233437221 is 12273433211456.

It is not a de Polignac number, because 65411233437221 - 2⁶ = 65411233437157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65411233437521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25903025 + ... + 28315881.

It is an arithmetic number, because the mean of its divisors is an integer number (4683839949600).

Almost surely, 2^{65411233437221} is an apocalyptic number.

It is an amenable number.

65411233437221 is a deficient number, since it is larger than the sum of its proper divisors (9530205756379).

65411233437221 is a wasteful number, since it uses less digits than its factorization.

65411233437221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2422484.

The product of its digits is 725760, while the sum is 44.

Adding to 65411233437221 its reverse (12273433211456), we get a palindrome (77684666648677).

The spelling of 65411233437221 in words is "sixty-five trillion, four hundred eleven billion, two hundred thirty-three million, four hundred thirty-seven thousand, two hundred twenty-one".