643068250001 has 8 divisors (see below), whose sum is σ = 660480872040. Its totient is φ = 625657333248.

The previous prime is 643068249991. The next prime is 643068250021. The reversal of 643068250001 is 100052860346.

It can be written as a sum of positive squares in 4 ways, for example, as 212174469376 + 430893780625 = 460624^2 + 656425^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 643068250001 - 2⁶ = 643068249937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (643068250021) 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, 357335 + ... + 1189043.

It is an arithmetic number, because the mean of its divisors is an integer number (82560109005).

Almost surely, 2^643068250001 is an apocalyptic number.

It is an amenable number.

643068250001 is a deficient number, since it is larger than the sum of its proper divisors (17412622039).

643068250001 is a wasteful number, since it uses less digits than its factorization.

643068250001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852643.

The product of its (nonzero) digits is 34560, while the sum is 35.

The spelling of 643068250001 in words is "six hundred forty-three billion, sixty-eight million, two hundred fifty thousand, one".