65027127505621 has 4 divisors (see below), whose sum is σ = 65043022676544. Its totient is φ = 65011232334700.

The previous prime is 65027127505609. The next prime is 65027127505651. The reversal of 65027127505621 is 12650572172056.

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 65027127505621 - 2¹³ = 65027127497429 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 (65027127505651) 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, 7947579325 + ... + 7947587506.

It is an arithmetic number, because the mean of its divisors is an integer number (16260755669136).

Almost surely, 2^{65027127505621} is an apocalyptic number.

It is an amenable number.

65027127505621 is a deficient number, since it is larger than the sum of its proper divisors (15895170923).

65027127505621 is a wasteful number, since it uses less digits than its factorization.

65027127505621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15895170922.

The product of its (nonzero) digits is 1764000, while the sum is 49.

Adding to 65027127505621 its reverse (12650572172056), we get a palindrome (77677699677677).

The spelling of 65027127505621 in words is "sixty-five trillion, twenty-seven billion, one hundred twenty-seven million, five hundred five thousand, six hundred twenty-one".