71284182821 has 8 divisors (see below), whose sum is σ = 72458124288. Its totient is φ = 70110414000.

The previous prime is 71284182803. The next prime is 71284182829. The reversal of 71284182821 is 12828148217.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71284182821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71284182829) 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, 991976 + ... + 1061406.

It is an arithmetic number, because the mean of its divisors is an integer number (9057265536).

Almost surely, 2^71284182821 is an apocalyptic number.

It is an amenable number.

71284182821 is a deficient number, since it is larger than the sum of its proper divisors (1173941467).

71284182821 is a wasteful number, since it uses less digits than its factorization.

71284182821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86323.

The product of its digits is 114688, while the sum is 44.

The spelling of 71284182821 in words is "seventy-one billion, two hundred eighty-four million, one hundred eighty-two thousand, eight hundred twenty-one".