71867409841 has 8 divisors (see below), whose sum is σ = 72176903144. Its totient is φ = 71558277120.

The previous prime is 71867409811. The next prime is 71867409877. The reversal of 71867409841 is 14890476817.

It can be written as a sum of positive squares in 4 ways, for example, as 6484919841 + 65382490000 = 80529^2 + 255700^2 .

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 71867409841 - 2⁹ = 71867409329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71867409811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 313201 + ... + 491761.

It is an arithmetic number, because the mean of its divisors is an integer number (9022112893).

Almost surely, 2^71867409841 is an apocalyptic number.

It is an amenable number.

71867409841 is a deficient number, since it is larger than the sum of its proper divisors (309493303).

71867409841 is a wasteful number, since it uses less digits than its factorization.

71867409841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180291.

The product of its (nonzero) digits is 2709504, while the sum is 55.

The spelling of 71867409841 in words is "seventy-one billion, eight hundred sixty-seven million, four hundred nine thousand, eight hundred forty-one".