6421284389976 has 32 divisors (see below), whose sum is σ = 16122108890160. Its totient is φ = 2131241741312.

The previous prime is 6421284389959. The next prime is 6421284389987. The reversal of 6421284389976 is 6799834821246.

It is a self number, because there is not a number n which added to its sum of digits gives 6421284389976.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 574143585 + ... + 574154768.

Almost surely, 2^{6421284389976} is an apocalyptic number.

It is an amenable number.

6421284389976 is an abundant number, since it is smaller than the sum of its proper divisors (9700824500184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6421284389976 is a wasteful number, since it uses less digits than its factorization.

6421284389976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148298595 (or 1148298591 counting only the distinct ones).

The product of its digits is 250822656, while the sum is 69.

The spelling of 6421284389976 in words is "six trillion, four hundred twenty-one billion, two hundred eighty-four million, three hundred eighty-nine thousand, nine hundred seventy-six".