6871534521421 has 8 divisors (see below), whose sum is σ = 6919912525824. Its totient is φ = 6823285698480.

The previous prime is 6871534521419. The next prime is 6871534521463. The reversal of 6871534521421 is 1241254351786.

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 6871534521421 - 2¹ = 6871534521419 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 (6871534521491) 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, 32188605 + ... + 32401378.

It is an arithmetic number, because the mean of its divisors is an integer number (864989065728).

Almost surely, 2^{6871534521421} is an apocalyptic number.

It is an amenable number.

6871534521421 is a deficient number, since it is larger than the sum of its proper divisors (48378004403).

6871534521421 is a wasteful number, since it uses less digits than its factorization.

6871534521421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64590731.

The product of its digits is 1612800, while the sum is 49.

The spelling of 6871534521421 in words is "six trillion, eight hundred seventy-one billion, five hundred thirty-four million, five hundred twenty-one thousand, four hundred twenty-one".