6403821698 has 16 divisors (see below), whose sum is σ = 10407307680. Its totient is φ = 2943479616.

The previous prime is 6403821689. The next prime is 6403821719. The reversal of 6403821698 is 8961283046.

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, 2188628 + ... + 2191551.

It is an arithmetic number, because the mean of its divisors is an integer number (650456730).

Almost surely, 2^6403821698 is an apocalyptic number.

6403821698 is a deficient number, since it is larger than the sum of its proper divisors (4003485982).

6403821698 is a wasteful number, since it uses less digits than its factorization.

6403821698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4380241.

The product of its (nonzero) digits is 497664, while the sum is 47.

The square root of 6403821698 is about 80023.8820477987. The cubic root of 6403821698 is about 1857.0050172179.

The spelling of 6403821698 in words is "six billion, four hundred three million, eight hundred twenty-one thousand, six hundred ninety-eight".