6421684269 has 48 divisors (see below), whose sum is σ = 11701488960. Its totient is φ = 3079319040.

The previous prime is 6421684253. The next prime is 6421684273. The reversal of 6421684269 is 9624861246.

It is not a de Polignac number, because 6421684269 - 2⁴ = 6421684253 is a prime.

It is a super-2 number, since 2×6421684269² = 82476057701444128722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6421684229) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 131724 + ... + 173765.

It is an arithmetic number, because the mean of its divisors is an integer number (243781020).

Almost surely, 2^6421684269 is an apocalyptic number.

It is an amenable number.

6421684269 is a deficient number, since it is larger than the sum of its proper divisors (5279804691).

6421684269 is a wasteful number, since it uses less digits than its factorization.

6421684269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305530 (or 305523 counting only the distinct ones).

The product of its digits is 995328, while the sum is 48.

The square root of 6421684269 is about 80135.4120785561. The cubic root of 6421684269 is about 1858.7300334856.

The spelling of 6421684269 in words is "six billion, four hundred twenty-one million, six hundred eighty-four thousand, two hundred sixty-nine".