71000634287 has 4 divisors (see below), whose sum is σ = 77455237416. Its totient is φ = 64546031160.

The previous prime is 71000634259. The next prime is 71000634301. The reversal of 71000634287 is 78243600017.

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 71000634287 - 2³⁶ = 2281157551 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 71000634287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71000634227) 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, 3227301548 + ... + 3227301569.

It is an arithmetic number, because the mean of its divisors is an integer number (19363809354).

Almost surely, 2^71000634287 is an apocalyptic number.

71000634287 is a deficient number, since it is larger than the sum of its proper divisors (6454603129).

71000634287 is a wasteful number, since it uses less digits than its factorization.

71000634287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6454603128.

The product of its (nonzero) digits is 56448, while the sum is 38.

The spelling of 71000634287 in words is "seventy-one billion, six hundred thirty-four thousand, two hundred eighty-seven".