643245621060 has 96 divisors (see below), whose sum is σ = 2067220576512. Its totient is φ = 146396528640.

The previous prime is 643245621013. The next prime is 643245621061. The reversal of 643245621060 is 60126542346.

643245621060 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (643245621061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3188701 + ... + 3384420.

It is an arithmetic number, because the mean of its divisors is an integer number (21533547672).

Almost surely, 2^643245621060 is an apocalyptic number.

643245621060 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

643245621060 is an abundant number, since it is smaller than the sum of its proper divisors (1423974955452).

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

643245621060 is a wasteful number, since it uses less digits than its factorization.

643245621060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6573373 (or 6573371 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 39.

The spelling of 643245621060 in words is "six hundred forty-three billion, two hundred forty-five million, six hundred twenty-one thousand, sixty".