643060969700 has 18 divisors (see below), whose sum is σ = 1395442304466. Its totient is φ = 257224387840.

The previous prime is 643060969699. The next prime is 643060969703. The reversal of 643060969700 is 7969060346.

It can be written as a sum of positive squares in 3 ways, for example, as 3662428324 + 639398541376 = 60518^2 + 799624^2 .

It is a Harshad number since it is a multiple of its sum of digits (50).

It is not an unprimeable number, because it can be changed into a prime (643060969703) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3215304749 + ... + 3215304948.

Almost surely, 2^643060969700 is an apocalyptic number.

It is an amenable number.

643060969700 is an abundant number, since it is smaller than the sum of its proper divisors (752381334766).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

643060969700 is a wasteful number, since it uses less digits than its factorization.

643060969700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6430609711 (or 6430609704 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 50.

The spelling of 643060969700 in words is "six hundred forty-three billion, sixty million, nine hundred sixty-nine thousand, seven hundred".