646691282338 has 8 divisors (see below), whose sum is σ = 970184747088. Its totient is φ = 323296366644.

The previous prime is 646691282329. The next prime is 646691282351. The reversal of 646691282338 is 833282196646.

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

It is a super-2 number, since 2×646691282338² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24620856 + ... + 24647107.

It is an arithmetic number, because the mean of its divisors is an integer number (121273093386).

Almost surely, 2^646691282338 is an apocalyptic number.

646691282338 is a deficient number, since it is larger than the sum of its proper divisors (323493464750).

646691282338 is a wasteful number, since it uses less digits than its factorization.

646691282338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49274528.

The product of its digits is 17915904, while the sum is 58.

The spelling of 646691282338 in words is "six hundred forty-six billion, six hundred ninety-one million, two hundred eighty-two thousand, three hundred thirty-eight".