65171272911 has 4 divisors (see below), whose sum is σ = 86895030552. Its totient is φ = 43447515272.

The previous prime is 65171272909. The next prime is 65171272931. The reversal of 65171272911 is 11927217156.

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

It is a cyclic number.

It is not a de Polignac number, because 65171272911 - 2¹ = 65171272909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65171272931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10861878816 + ... + 10861878821.

It is an arithmetic number, because the mean of its divisors is an integer number (21723757638).

Almost surely, 2^65171272911 is an apocalyptic number.

65171272911 is a deficient number, since it is larger than the sum of its proper divisors (21723757641).

65171272911 is a wasteful number, since it uses less digits than its factorization.

65171272911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21723757640.

The product of its digits is 52920, while the sum is 42.

The spelling of 65171272911 in words is "sixty-five billion, one hundred seventy-one million, two hundred seventy-two thousand, nine hundred eleven".