646229631346 has 8 divisors (see below), whose sum is σ = 1043909404524. Its totient is φ = 298259829840.

The previous prime is 646229631287. The next prime is 646229631401. The reversal of 646229631346 is 643136922646.

It can be written as a sum of positive squares in 2 ways, for example, as 497291525721 + 148938105625 = 705189^2 + 385925^2 .

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

It is a super-2 number, since 2×646229631346² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 646229631293 and 646229631302.

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, 12427492885 + ... + 12427492936.

Almost surely, 2^646229631346 is an apocalyptic number.

646229631346 is a deficient number, since it is larger than the sum of its proper divisors (397679773178).

646229631346 is a wasteful number, since it uses less digits than its factorization.

646229631346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24854985836.

The product of its digits is 6718464, while the sum is 52.

The spelling of 646229631346 in words is "six hundred forty-six billion, two hundred twenty-nine million, six hundred thirty-one thousand, three hundred forty-six".