71664277852411 has 4 divisors (see below), whose sum is σ = 71685056133000. Its totient is φ = 71643499571824.

The previous prime is 71664277852403. The next prime is 71664277852451. The reversal of 71664277852411 is 11425877246617.

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 71664277852411 - 2³ = 71664277852403 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71664277852411.

It is not an unprimeable number, because it can be changed into a prime (71664277852451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10389135121 + ... + 10389142018.

It is an arithmetic number, because the mean of its divisors is an integer number (17921264033250).

Almost surely, 2^{71664277852411} is an apocalyptic number.

71664277852411 is a deficient number, since it is larger than the sum of its proper divisors (20778280589).

71664277852411 is a wasteful number, since it uses less digits than its factorization.

71664277852411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20778280588.

The product of its digits is 31610880, while the sum is 61.

The spelling of 71664277852411 in words is "seventy-one trillion, six hundred sixty-four billion, two hundred seventy-seven million, eight hundred fifty-two thousand, four hundred eleven".