643315076350 has 24 divisors (see below), whose sum is σ = 1196714865168. Its totient is φ = 257294025600.

The previous prime is 643315076317. The next prime is 643315076357. The reversal of 643315076350 is 53670513346.

It is a junction number, because it is equal to n+sod(n) for n = 643315076297 and 643315076306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643315076357) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 392034 + ... + 1200133.

It is an arithmetic number, because the mean of its divisors is an integer number (49863119382).

Almost surely, 2^643315076350 is an apocalyptic number.

643315076350 is a deficient number, since it is larger than the sum of its proper divisors (553399788818).

643315076350 is a wasteful number, since it uses less digits than its factorization.

643315076350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1600260 (or 1600255 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 43.

Adding to 643315076350 its reverse (53670513346), we get a palindrome (696985589696).

The spelling of 643315076350 in words is "six hundred forty-three billion, three hundred fifteen million, seventy-six thousand, three hundred fifty".