71439812867 has 8 divisors (see below), whose sum is σ = 73906428240. Its totient is φ = 68973409120.

The previous prime is 71439812849. The next prime is 71439812881. The reversal of 71439812867 is 76821893417.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71439812867 - 2¹² = 71439808771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71439512867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 968192 + ... + 1039362.

It is an arithmetic number, because the mean of its divisors is an integer number (9238303530).

Almost surely, 2^71439812867 is an apocalyptic number.

71439812867 is a deficient number, since it is larger than the sum of its proper divisors (2466615373).

71439812867 is a wasteful number, since it uses less digits than its factorization.

71439812867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105813.

The product of its digits is 4064256, while the sum is 56.

The spelling of 71439812867 in words is "seventy-one billion, four hundred thirty-nine million, eight hundred twelve thousand, eight hundred sixty-seven".