71643413871 has 80 divisors (see below), whose sum is σ = 116647581600. Its totient is φ = 43637667840.

The previous prime is 71643413861. The next prime is 71643413923. The reversal of 71643413871 is 17831434617.

71643413871 is a `hidden beast` number, since 7 + 16 + 434 + 138 + 71 = 666.

It is not a de Polignac number, because 71643413871 - 2¹⁴ = 71643397487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71643413801) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 26543080 + ... + 26545778.

It is an arithmetic number, because the mean of its divisors is an integer number (1458094770).

Almost surely, 2^71643413871 is an apocalyptic number.

71643413871 is a deficient number, since it is larger than the sum of its proper divisors (45004167729).

71643413871 is a wasteful number, since it uses less digits than its factorization.

71643413871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3286 (or 3277 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The spelling of 71643413871 in words is "seventy-one billion, six hundred forty-three million, four hundred thirteen thousand, eight hundred seventy-one".