71887078817 has 8 divisors (see below), whose sum is σ = 73016999040. Its totient is φ = 70762657680.

The previous prime is 71887078801. The next prime is 71887078829.

71887078817 is nontrivially palindromic in base 10.

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 71887078817 - 2⁴ = 71887078801 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 71887078817.

It is not an unprimeable number, because it can be changed into a prime (71887078847) 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, 1348418 + ... + 1400715.

It is an arithmetic number, because the mean of its divisors is an integer number (9127124880).

Almost surely, 2^71887078817 is an apocalyptic number.

It is an amenable number.

71887078817 is a deficient number, since it is larger than the sum of its proper divisors (1129920223).

71887078817 is a wasteful number, since it uses less digits than its factorization.

71887078817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2749543.

The product of its (nonzero) digits is 9834496, while the sum is 62.

The spelling of 71887078817 in words is "seventy-one billion, eight hundred eighty-seven million, seventy-eight thousand, eight hundred seventeen".