646974122 has 8 divisors (see below), whose sum is σ = 970612416. Its totient is φ = 323436652.

The previous prime is 646974101. The next prime is 646974157. The reversal of 646974122 is 221479646.

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

It is a self number, because there is not a number n which added to its sum of digits gives 646974122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6338 + ... + 36525.

It is an arithmetic number, because the mean of its divisors is an integer number (121326552).

Almost surely, 2^646974122 is an apocalyptic number.

646974122 is a deficient number, since it is larger than the sum of its proper divisors (323638294).

646974122 is a wasteful number, since it uses less digits than its factorization.

646974122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50412.

The product of its digits is 145152, while the sum is 41.

The square root of 646974122 is about 25435.6859942876. The cubic root of 646974122 is about 864.8928429300.

The spelling of 646974122 in words is "six hundred forty-six million, nine hundred seventy-four thousand, one hundred twenty-two".