6421732546 has 8 divisors (see below), whose sum is σ = 9638928144. Its totient is φ = 3208756500.

The previous prime is 6421732501. The next prime is 6421732567. The reversal of 6421732546 is 6452371246.

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

It is a junction number, because it is equal to n+sod(n) for n = 6421732499 and 6421732508.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1051080 + ... + 1057171.

It is an arithmetic number, because the mean of its divisors is an integer number (1204866018).

Almost surely, 2^6421732546 is an apocalyptic number.

6421732546 is a deficient number, since it is larger than the sum of its proper divisors (3217195598).

6421732546 is a wasteful number, since it uses less digits than its factorization.

6421732546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2109776.

The product of its digits is 241920, while the sum is 40.

The square root of 6421732546 is about 80135.7132993773. The cubic root of 6421732546 is about 1858.7346913335.

The spelling of 6421732546 in words is "six billion, four hundred twenty-one million, seven hundred thirty-two thousand, five hundred forty-six".