6421743458 has 48 divisors (see below), whose sum is σ = 10814860800. Its totient is φ = 2856230208.

The previous prime is 6421743457. The next prime is 6421743473. The reversal of 6421743458 is 8543471246.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (6421743457) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1335743 + ... + 1340541.

It is an arithmetic number, because the mean of its divisors is an integer number (225309600).

Almost surely, 2^6421743458 is an apocalyptic number.

6421743458 is a deficient number, since it is larger than the sum of its proper divisors (4393117342).

6421743458 is a wasteful number, since it uses less digits than its factorization.

6421743458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4971 (or 4958 counting only the distinct ones).

The product of its digits is 645120, while the sum is 44.

The square root of 6421743458 is about 80135.7813838488. The cubic root of 6421743458 is about 1858.7357441388.

The spelling of 6421743458 in words is "six billion, four hundred twenty-one million, seven hundred forty-three thousand, four hundred fifty-eight".