643313645146 has 16 divisors (see below), whose sum is σ = 970969819968. Its totient is φ = 319660473600.

The previous prime is 643313645141. The next prime is 643313645167. The reversal of 643313645146 is 641546313346.

It is a super-2 number, since 2×643313645146² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 643313645096 and 643313645105.

It is not an unprimeable number, because it can be changed into a prime (643313645141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 483390 + ... + 1233001.

It is an arithmetic number, because the mean of its divisors is an integer number (60685613748).

Almost surely, 2^643313645146 is an apocalyptic number.

643313645146 is a deficient number, since it is larger than the sum of its proper divisors (327656174822).

643313645146 is a wasteful number, since it uses less digits than its factorization.

643313645146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1717557.

The product of its digits is 1866240, while the sum is 46.

The spelling of 643313645146 in words is "six hundred forty-three billion, three hundred thirteen million, six hundred forty-five thousand, one hundred forty-six".